78873964 has 24 divisors (see below), whose sum is σ = 151457040. Its totient is φ = 35715264.

The previous prime is 78873953. The next prime is 78873979. The reversal of 78873964 is 46937887.

It is a happy number.

It is a super-2 number, since 2×78873964² = 12442204394146592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11554 + ... + 17065.

It is an arithmetic number, because the mean of its divisors is an integer number (6310710).

Almost surely, 2^78873964 is an apocalyptic number.

It is an amenable number.

78873964 is a deficient number, since it is larger than the sum of its proper divisors (72583076).

78873964 is a wasteful number, since it uses less digits than its factorization.

78873964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28689 (or 28687 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 52.

The square root of 78873964 is about 8881.1015082590. The cubic root of 78873964 is about 428.8557354387.

The spelling of 78873964 in words is "seventy-eight million, eight hundred seventy-three thousand, nine hundred sixty-four".