78944957 has 16 divisors (see below), whose sum is σ = 102880512. Its totient is φ = 58786560.

The previous prime is 78944951. The next prime is 78944969. The reversal of 78944957 is 75944987.

It is not a de Polignac number, because 78944957 - 2⁶ = 78944893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78944899 and 78944908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78944951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23969 + ... + 27062.

It is an arithmetic number, because the mean of its divisors is an integer number (6430032).

Almost surely, 2^78944957 is an apocalyptic number.

It is an amenable number.

78944957 is a deficient number, since it is larger than the sum of its proper divisors (23935555).

78944957 is a wasteful number, since it uses less digits than its factorization.

78944957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51068.

The product of its digits is 2540160, while the sum is 53.

The square root of 78944957 is about 8885.0974671075. The cubic root of 78944957 is about 428.9843652328.

The spelling of 78944957 in words is "seventy-eight million, nine hundred forty-four thousand, nine hundred fifty-seven".