70712728 has 16 divisors (see below), whose sum is σ = 132724080. Its totient is φ = 35319648.

The previous prime is 70712723. The next prime is 70712729. The reversal of 70712728 is 82721707.

It is a junction number, because it is equal to n+sod(n) for n = 70712693 and 70712702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70712723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4701 + ... + 12787.

It is an arithmetic number, because the mean of its divisors is an integer number (8295255).

Almost surely, 2^70712728 is an apocalyptic number.

It is an amenable number.

70712728 is a deficient number, since it is larger than the sum of its proper divisors (62011352).

70712728 is a wasteful number, since it uses less digits than its factorization.

70712728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9186 (or 9182 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 70712728 is about 8409.0860383278. The cubic root of 70712728 is about 413.5225500877.

The spelling of 70712728 in words is "seventy million, seven hundred twelve thousand, seven hundred twenty-eight".