70525728 has 360 divisors, whose sum is σ = 267841728. Its totient is φ = 17791488.

The previous prime is 70525727. The next prime is 70525747. The reversal of 70525728 is 82752507.

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 = 70525692 and 70525701.

It is not an unprimeable number, because it can be changed into a prime (70525727) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3066325 + ... + 3066347.

Almost surely, 2^70525728 is an apocalyptic number.

70525728 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70525728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133920864).

70525728 is an abundant number, since it is smaller than the sum of its proper divisors (197316000).

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

70525728 is a wasteful number, since it uses less digits than its factorization.

70525728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 70525728 is about 8397.9597522255. The cubic root of 70525728 is about 413.1577077898.

It can be divided in two parts, 70525 and 728, that added together give a triangular number (71253 = T₃₇₇).

The spelling of 70525728 in words is "seventy million, five hundred twenty-five thousand, seven hundred twenty-eight".