78090944 has 14 divisors (see below), whose sum is σ = 154961844. Its totient is φ = 39045440.

The previous prime is 78090913. The next prime is 78090949. The reversal of 78090944 is 44909087.

It is a super-2 number, since 2×78090944² = 12196391069622272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78090949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610022 + ... + 610149.

Almost surely, 2^78090944 is an apocalyptic number.

It is an amenable number.

78090944 is a deficient number, since it is larger than the sum of its proper divisors (76870900).

78090944 is a wasteful number, since it uses less digits than its factorization.

78090944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220183 (or 1220173 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 78090944 is about 8836.9080565546. The cubic root of 78090944 is about 427.4318603708.

The spelling of 78090944 in words is "seventy-eight million, ninety thousand, nine hundred forty-four".