70728788 has 24 divisors (see below), whose sum is σ = 133852320. Its totient is φ = 32508000.

The previous prime is 70728743. The next prime is 70728799. The reversal of 70728788 is 88782707.

It is a super-2 number, since 2×70728788² = 10005122903897888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10343 + ... + 15761.

It is an arithmetic number, because the mean of its divisors is an integer number (5577180).

Almost surely, 2^70728788 is an apocalyptic number.

It is an amenable number.

70728788 is a deficient number, since it is larger than the sum of its proper divisors (63123532).

70728788 is a wasteful number, since it uses less digits than its factorization.

70728788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5687 (or 5685 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 47.

The square root of 70728788 is about 8410.0409035866. The cubic root of 70728788 is about 413.5538535962.

The spelling of 70728788 in words is "seventy million, seven hundred twenty-eight thousand, seven hundred eighty-eight".