70651728 has 360 divisors, whose sum is σ = 264625920. Its totient is φ = 17418240.

The previous prime is 70651681. The next prime is 70651771. The reversal of 70651728 is 82715607.

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 = 70651692 and 70651701.

It is a congruent number.

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 71 ways as a sum of consecutive naturals, for example, 2279073 + ... + 2279103.

It is an arithmetic number, because the mean of its divisors is an integer number (735072).

Almost surely, 2^70651728 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 70651728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132312960).

70651728 is an abundant number, since it is smaller than the sum of its proper divisors (193974192).

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

70651728 is a wasteful number, since it uses less digits than its factorization.

70651728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 70651728 is about 8405.4582266525. The cubic root of 70651728 is about 413.4036081229.

The spelling of 70651728 in words is "seventy million, six hundred fifty-one thousand, seven hundred twenty-eight".