78093290 has 32 divisors (see below), whose sum is σ = 153933696. Its totient is φ = 28288960.

The previous prime is 78093277. The next prime is 78093299. The reversal of 78093290 is 9239087.

It is not an unprimeable number, because it can be changed into a prime (78093299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31019 + ... + 33441.

It is an arithmetic number, because the mean of its divisors is an integer number (4810428).

Almost surely, 2^78093290 is an apocalyptic number.

78093290 is a deficient number, since it is larger than the sum of its proper divisors (75840406).

78093290 is a wasteful number, since it uses less digits than its factorization.

78093290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 78093290 is about 8837.0407942931. The cubic root of 78093290 is about 427.4361406157.

The spelling of 78093290 in words is "seventy-eight million, ninety-three thousand, two hundred ninety".