78939332 has 6 divisors (see below), whose sum is σ = 138143838. Its totient is φ = 39469664.

The previous prime is 78939331. The next prime is 78939337. The reversal of 78939332 is 23393987.

It can be written as a sum of positive squares in only one way, i.e., 49084036 + 29855296 = 7006^2 + 5464^2 .

It is not an unprimeable number, because it can be changed into a prime (78939331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9867413 + ... + 9867420.

It is an arithmetic number, because the mean of its divisors is an integer number (23023973).

Almost surely, 2^78939332 is an apocalyptic number.

It is an amenable number.

78939332 is a deficient number, since it is larger than the sum of its proper divisors (59204506).

78939332 is a wasteful number, since it uses less digits than its factorization.

78939332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19734837 (or 19734835 counting only the distinct ones).

The product of its digits is 244944, while the sum is 44.

The square root of 78939332 is about 8884.7809202028. The cubic root of 78939332 is about 428.9741763009.

The spelling of 78939332 in words is "seventy-eight million, nine hundred thirty-nine thousand, three hundred thirty-two".