78791290 has 16 divisors (see below), whose sum is σ = 149289120. Its totient is φ = 29857680.

The previous prime is 78791267. The next prime is 78791333. The reversal of 78791290 is 9219787.

It is a happy 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, 207156 + ... + 207535.

It is an arithmetic number, because the mean of its divisors is an integer number (9330570).

Almost surely, 2^78791290 is an apocalyptic number.

78791290 is a deficient number, since it is larger than the sum of its proper divisors (70497830).

78791290 is a wasteful number, since it uses less digits than its factorization.

78791290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414717.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 78791290 is about 8876.4457977278. The cubic root of 78791290 is about 428.7058439228.

The spelling of 78791290 in words is "seventy-eight million, seven hundred ninety-one thousand, two hundred ninety".