78505372 has 12 divisors (see below), whose sum is σ = 149873976. Its totient is φ = 35684240.

The previous prime is 78505363. The next prime is 78505391. The reversal of 78505372 is 27350587.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892063 + ... + 892150.

It is an arithmetic number, because the mean of its divisors is an integer number (12489498).

Almost surely, 2^78505372 is an apocalyptic number.

It is an amenable number.

78505372 is a deficient number, since it is larger than the sum of its proper divisors (71368604).

78505372 is a wasteful number, since it uses less digits than its factorization.

78505372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784228 (or 1784226 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 78505372 is about 8860.3257276468. The cubic root of 78505372 is about 428.1866525097.

The spelling of 78505372 in words is "seventy-eight million, five hundred five thousand, three hundred seventy-two".