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72990350 = 25217431997
BaseRepresentation
bin1000101100110…
…11111010001110
312002100021221022
410112123322032
5122141142400
611124234142
71544256566
oct426337216
9162307838
1072990350
1138223804
122053b952
1312177974
14999dda6
15661bb85
hex459be8e

72990350 has 48 divisors (see below), whose sum is σ = 147164688. Its totient is φ = 26826240.

The previous prime is 72990349. The next prime is 72990383. The reversal of 72990350 is 5309927.

It is a self number, because there is not a number n which added to its sum of digits gives 72990350.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35552 + ... + 37548.

It is an arithmetic number, because the mean of its divisors is an integer number (3065931).

Almost surely, 272990350 is an apocalyptic number.

72990350 is an abundant number, since it is smaller than the sum of its proper divisors (74174338).

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

72990350 is a wasteful number, since it uses less digits than its factorization.

72990350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069 (or 2064 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 72990350 is about 8543.4390031181. The cubic root of 72990350 is about 417.9155030169.

The spelling of 72990350 in words is "seventy-two million, nine hundred ninety thousand, three hundred fifty".

Divisors: 1 2 5 10 17 25 34 43 50 85 86 170 215 425 430 731 850 1075 1462 1997 2150 3655 3994 7310 9985 18275 19970 33949 36550 49925 67898 85871 99850 169745 171742 339490 429355 848725 858710 1459807 1697450 2146775 2919614 4293550 7299035 14598070 36495175 72990350