70720724 has 12 divisors (see below), whose sum is σ = 126639744. Its totient is φ = 34537944.

The previous prime is 70720723. The next prime is 70720751. The reversal of 70720724 is 42702707.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70720723) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 205412 + ... + 205755.

It is an arithmetic number, because the mean of its divisors is an integer number (10553312).

Almost surely, 2^70720724 is an apocalyptic number.

It is an amenable number.

70720724 is a deficient number, since it is larger than the sum of its proper divisors (55919020).

70720724 is a wasteful number, since it uses less digits than its factorization.

70720724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411214 (or 411212 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 70720724 is about 8409.5614630015. The cubic root of 70720724 is about 413.5381361629.

The spelling of 70720724 in words is "seventy million, seven hundred twenty thousand, seven hundred twenty-four".