78736472 has 8 divisors (see below), whose sum is σ = 147630900. Its totient is φ = 39368232.

The previous prime is 78736451. The next prime is 78736487. The reversal of 78736472 is 27463787.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4921022 + ... + 4921037.

Almost surely, 2^78736472 is an apocalyptic number.

It is an amenable number.

78736472 is a deficient number, since it is larger than the sum of its proper divisors (68894428).

78736472 is a wasteful number, since it uses less digits than its factorization.

78736472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9842065 (or 9842061 counting only the distinct ones).

The product of its digits is 395136, while the sum is 44.

The square root of 78736472 is about 8873.3574254619. The cubic root of 78736472 is about 428.6063987126.

The spelling of 78736472 in words is "seventy-eight million, seven hundred thirty-six thousand, four hundred seventy-two".