78739132 has 24 divisors (see below), whose sum is σ = 144934272. Its totient is φ = 37377600.

The previous prime is 78739109. The next prime is 78739153. The reversal of 78739132 is 23193787.

It is a super-2 number, since 2×78739132² = 12399701816226848, 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 in 7 ways as a sum of consecutive naturals, for example, 582 + ... + 12562.

It is an arithmetic number, because the mean of its divisors is an integer number (6038928).

Almost surely, 2^78739132 is an apocalyptic number.

It is an amenable number.

78739132 is a deficient number, since it is larger than the sum of its proper divisors (66195140).

78739132 is a wasteful number, since it uses less digits than its factorization.

78739132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12069 (or 12067 counting only the distinct ones).

The product of its digits is 63504, while the sum is 40.

The square root of 78739132 is about 8873.5073110918. The cubic root of 78739132 is about 428.6112252779.

The spelling of 78739132 in words is "seventy-eight million, seven hundred thirty-nine thousand, one hundred thirty-two".