78932505 has 32 divisors (see below), whose sum is σ = 130351104. Its totient is φ = 40764096.

The previous prime is 78932453. The next prime is 78932537. The reversal of 78932505 is 50523987.

It is not a de Polignac number, because 78932505 - 2¹⁶ = 78866969 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72072 + ... + 73158.

It is an arithmetic number, because the mean of its divisors is an integer number (4073472).

Almost surely, 2^78932505 is an apocalyptic number.

It is an amenable number.

78932505 is a deficient number, since it is larger than the sum of its proper divisors (51418599).

78932505 is a wasteful number, since it uses less digits than its factorization.

78932505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 78932505 is about 8884.3967155908. The cubic root of 78932505 is about 428.9618094572.

The spelling of 78932505 in words is "seventy-eight million, nine hundred thirty-two thousand, five hundred five".