78464736 has 72 divisors (see below), whose sum is σ = 255016944. Its totient is φ = 22417920.

The previous prime is 78464713. The next prime is 78464773. The reversal of 78464736 is 63746487.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 78464691 and 78464700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17445 + ... + 21476.

It is an arithmetic number, because the mean of its divisors is an integer number (3541902).

Almost surely, 2^78464736 is an apocalyptic number.

It is an amenable number.

78464736 is an abundant number, since it is smaller than the sum of its proper divisors (176552208).

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

78464736 is a wasteful number, since it uses less digits than its factorization.

78464736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38944 (or 38933 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 78464736 is about 8858.0322871392. The cubic root of 78464736 is about 428.1127603441.

The spelling of 78464736 in words is "seventy-eight million, four hundred sixty-four thousand, seven hundred thirty-six".