78195808 has 12 divisors (see below), whose sum is σ = 153948060. Its totient is φ = 39097888.

The previous prime is 78195797. The next prime is 78195823. The reversal of 78195808 is 80859187.

It is a super-2 number, since 2×78195808² = 12229168777545728, 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 as a sum of consecutive naturals, namely, 1221778 + ... + 1221841.

It is an arithmetic number, because the mean of its divisors is an integer number (12829005).

Almost surely, 2^78195808 is an apocalyptic number.

It is an amenable number.

78195808 is a deficient number, since it is larger than the sum of its proper divisors (75752252).

78195808 is a wasteful number, since it uses less digits than its factorization.

78195808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443629 (or 2443621 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 46.

The square root of 78195808 is about 8842.8393630101. The cubic root of 78195808 is about 427.6230996455.

It can be divided in two parts, 78195 and 808, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 78195808 in words is "seventy-eight million, one hundred ninety-five thousand, eight hundred eight".