78923672 has 32 divisors (see below), whose sum is σ = 155109600. Its totient is φ = 37576704.

The previous prime is 78923653. The next prime is 78923681. The reversal of 78923672 is 27632987.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46454 + ... + 48122.

It is an arithmetic number, because the mean of its divisors is an integer number (4847175).

Almost surely, 2^78923672 is an apocalyptic number.

It is an amenable number.

78923672 is a deficient number, since it is larger than the sum of its proper divisors (76185928).

78923672 is a wasteful number, since it uses less digits than its factorization.

78923672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955 (or 1951 counting only the distinct ones).

The product of its digits is 254016, while the sum is 44.

The square root of 78923672 is about 8883.8995942097. The cubic root of 78923672 is about 428.9458077648.

The spelling of 78923672 in words is "seventy-eight million, nine hundred twenty-three thousand, six hundred seventy-two".