78093864 has 24 divisors (see below), whose sum is σ = 211504410. Its totient is φ = 26031264.

The previous prime is 78093853. The next prime is 78093877. The reversal of 78093864 is 46839087.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 74960964 + 3132900 = 8658^2 + 1770^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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 5 ways as a sum of consecutive naturals, for example, 542247 + ... + 542390.

Almost surely, 2^78093864 is an apocalyptic number.

It is an amenable number.

78093864 is an abundant number, since it is smaller than the sum of its proper divisors (133410546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78093864 is a wasteful number, since it uses less digits than its factorization.

78093864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084649 (or 1084642 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 78093864 is about 8837.0732711685. The cubic root of 78093864 is about 427.4371878578.

The spelling of 78093864 in words is "seventy-eight million, ninety-three thousand, eight hundred sixty-four".