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70039728 = 243411173
BaseRepresentation
bin1000010110010…
…11100010110000
311212210101110000
410023023202300
5120412232403
610541110000
71510220313
oct413134260
9155711400
1070039728
1136598980
121b558300
1311683935
14943297a
1562377a3
hex42cb8b0

70039728 has 200 divisors, whose sum is σ = 234962640. Its totient is φ = 19975680.

The previous prime is 70039709. The next prime is 70039771. The reversal of 70039728 is 82793007.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 70039692 and 70039701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4119976 + ... + 4119992.

Almost surely, 270039728 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 70039728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117481320).

70039728 is an abundant number, since it is smaller than the sum of its proper divisors (164922912).

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

70039728 is a wasteful number, since it uses less digits than its factorization.

70039728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 70039728 is about 8368.9741306805. The cubic root of 70039728 is about 412.2064821035.

The spelling of 70039728 in words is "seventy million, thirty-nine thousand, seven hundred twenty-eight".