78494870 has 16 divisors (see below), whose sum is σ = 141704208. Its totient is φ = 31306080.

The previous prime is 78494863. The next prime is 78494881. The reversal of 78494870 is 7849487.

It is a super-2 number, since 2×78494870² = 12322889232633800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7841 + ... + 14780.

It is an arithmetic number, because the mean of its divisors is an integer number (8856513).

Almost surely, 2^78494870 is an apocalyptic number.

78494870 is a deficient number, since it is larger than the sum of its proper divisors (63209338).

78494870 is a wasteful number, since it uses less digits than its factorization.

78494870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22975.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 78494870 is about 8859.7330659563. The cubic root of 78494870 is about 428.1675582038.

The spelling of 78494870 in words is "seventy-eight million, four hundred ninety-four thousand, eight hundred seventy".