78622672 has 10 divisors (see below), whose sum is σ = 152331458. Its totient is φ = 39311328.

The previous prime is 78622651. The next prime is 78622673. The reversal of 78622672 is 27622687.

It can be written as a sum of positive squares in only one way, i.e., 48108096 + 30514576 = 6936^2 + 5524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78622673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2456943 + ... + 2456974.

Almost surely, 2^78622672 is an apocalyptic number.

It is an amenable number.

78622672 is a deficient number, since it is larger than the sum of its proper divisors (73708786).

78622672 is a wasteful number, since it uses less digits than its factorization.

78622672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4913925 (or 4913919 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

The square root of 78622672 is about 8866.9426523464. The cubic root of 78622672 is about 428.3998069234.

The spelling of 78622672 in words is "seventy-eight million, six hundred twenty-two thousand, six hundred seventy-two".