78540732 has 48 divisors (see below), whose sum is σ = 210201600. Its totient is φ = 25334640.

The previous prime is 78540727. The next prime is 78540743. The reversal of 78540732 is 23704587.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8382 + ... + 15077.

It is an arithmetic number, because the mean of its divisors is an integer number (4379200).

Almost surely, 2^78540732 is an apocalyptic number.

It is an amenable number.

78540732 is an abundant number, since it is smaller than the sum of its proper divisors (131660868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78540732 is a wasteful number, since it uses less digits than its factorization.

78540732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23503 (or 23495 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 78540732 is about 8862.3209149748. The cubic root of 78540732 is about 428.2509300957.

The spelling of 78540732 in words is "seventy-eight million, five hundred forty thousand, seven hundred thirty-two".