78197932 has 24 divisors (see below), whose sum is σ = 138559680. Its totient is φ = 38613120.

The previous prime is 78197929. The next prime is 78197941. The reversal of 78197932 is 23979187.

It is a happy number.

78197932 is nontrivially palindromic in base 8.

It is a super-2 number, since 2×78197932² = 12229833138153248, which contains 22 as substring.

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, 149832 + ... + 150352.

It is an arithmetic number, because the mean of its divisors is an integer number (5773320).

Almost surely, 2^78197932 is an apocalyptic number.

It is an amenable number.

78197932 is a deficient number, since it is larger than the sum of its proper divisors (60361748).

78197932 is a wasteful number, since it uses less digits than its factorization.

78197932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 919 counting only the distinct ones).

The product of its digits is 190512, while the sum is 46.

The square root of 78197932 is about 8842.9594593665. The cubic root of 78197932 is about 427.6269713928.

It can be divided in two parts, 7819 and 7932, that added together give a palindrome (15751).

The spelling of 78197932 in words is "seventy-eight million, one hundred ninety-seven thousand, nine hundred thirty-two".