78761870 has 32 divisors (see below), whose sum is σ = 155160576. Its totient is φ = 28548000.

The previous prime is 78761857. The next prime is 78761909. The reversal of 78761870 is 7816787.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39395 + ... + 41345.

It is an arithmetic number, because the mean of its divisors is an integer number (4848768).

Almost surely, 2^78761870 is an apocalyptic number.

78761870 is a deficient number, since it is larger than the sum of its proper divisors (76398706).

78761870 is a wasteful number, since it uses less digits than its factorization.

78761870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336.

The product of its (nonzero) digits is 131712, while the sum is 44.

The square root of 78761870 is about 8874.7884481829. The cubic root of 78761870 is about 428.6524789038.

The spelling of 78761870 in words is "seventy-eight million, seven hundred sixty-one thousand, eight hundred seventy".