70440657 has 32 divisors (see below), whose sum is σ = 115153920. Its totient is φ = 37402560.

The previous prime is 70440647. The next prime is 70440659. The reversal of 70440657 is 75604407.

It is not a de Polignac number, because 70440657 - 2⁴ = 70440641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70440659) 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 31 ways as a sum of consecutive naturals, for example, 19482 + ... + 22812.

It is an arithmetic number, because the mean of its divisors is an integer number (3598560).

Almost surely, 2^70440657 is an apocalyptic number.

It is an amenable number.

70440657 is a deficient number, since it is larger than the sum of its proper divisors (44713263).

70440657 is a wasteful number, since it uses less digits than its factorization.

70440657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3413.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 70440657 is about 8392.8932436914. The cubic root of 70440657 is about 412.9915184097.

The spelling of 70440657 in words is "seventy million, four hundred forty thousand, six hundred fifty-seven".