78108090 has 32 divisors (see below), whose sum is σ = 189838080. Its totient is φ = 20564544.

The previous prime is 78108083. The next prime is 78108101. The reversal of 78108090 is 9080187.

It is a super-2 number, since 2×78108090² = 12201747446896200, which contains 22 as substring.

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, 14109 + ... + 18848.

It is an arithmetic number, because the mean of its divisors is an integer number (5932440).

Almost surely, 2^78108090 is an apocalyptic number.

78108090 is an abundant number, since it is smaller than the sum of its proper divisors (111729990).

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

78108090 is a wasteful number, since it uses less digits than its factorization.

78108090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33046.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 78108090 is about 8837.8781390105. The cubic root of 78108090 is about 427.4631410374.

The spelling of 78108090 in words is "seventy-eight million, one hundred eight thousand, ninety".