78632940 has 24 divisors (see below), whose sum is σ = 220172400. Its totient is φ = 20968768.

The previous prime is 78632923. The next prime is 78632947. The reversal of 78632940 is 4923687.

It is not an unprimeable number, because it can be changed into a prime (78632947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655215 + ... + 655334.

It is an arithmetic number, because the mean of its divisors is an integer number (9173850).

Almost surely, 2^78632940 is an apocalyptic number.

It is an amenable number.

78632940 is an abundant number, since it is smaller than the sum of its proper divisors (141539460).

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

78632940 is a wasteful number, since it uses less digits than its factorization.

78632940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310561 (or 1310559 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 78632940 is about 8867.5216379775. The cubic root of 78632940 is about 428.4184555635.

The spelling of 78632940 in words is "seventy-eight million, six hundred thirty-two thousand, nine hundred forty".