78641464 has 16 divisors (see below), whose sum is σ = 160857720. Its totient is φ = 35746080.

The previous prime is 78641449. The next prime is 78641477. The reversal of 78641464 is 46414687.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446739 + ... + 446914.

Almost surely, 2^78641464 is an apocalyptic number.

It is an amenable number.

78641464 is an abundant number, since it is smaller than the sum of its proper divisors (82216256).

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

78641464 is a wasteful number, since it uses less digits than its factorization.

78641464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893670 (or 893666 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 78641464 is about 8868.0022552997. The cubic root of 78641464 is about 428.4339355348.

Subtracting from 78641464 its sum of digits (40), we obtain a square (78641424 = 8868²).

The spelling of 78641464 in words is "seventy-eight million, six hundred forty-one thousand, four hundred sixty-four".