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72830648 = 231119431013
BaseRepresentation
bin1000101011101…
…00111010111000
312002001011212102
410111310322320
5122121040043
611121002532
71543023152
oct425647270
9162034772
1072830648
1138124820
1220483448
1312120077
14995bad2
1565d96b8
hex4574eb8

72830648 has 64 divisors (see below), whose sum is σ = 160617600. Its totient is φ = 30602880.

The previous prime is 72830623. The next prime is 72830663. The reversal of 72830648 is 84603827.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71390 + ... + 72402.

It is an arithmetic number, because the mean of its divisors is an integer number (2509650).

Almost surely, 272830648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72830648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80308800).

72830648 is an abundant number, since it is smaller than the sum of its proper divisors (87786952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72830648 is a wasteful number, since it uses less digits than its factorization.

72830648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 72830648 is about 8534.0874145980. The cubic root of 72830648 is about 417.6104824319.

The spelling of 72830648 in words is "seventy-two million, eight hundred thirty thousand, six hundred forty-eight".

Divisors: 1 2 4 8 11 19 22 38 43 44 76 86 88 152 172 209 344 418 473 817 836 946 1013 1634 1672 1892 2026 3268 3784 4052 6536 8104 8987 11143 17974 19247 22286 35948 38494 43559 44572 71896 76988 87118 89144 153976 174236 211717 348472 423434 479149 827621 846868 958298 1655242 1693736 1916596 3310484 3833192 6620968 9103831 18207662 36415324 72830648