78550464 has 56 divisors (see below), whose sum is σ = 208483200. Its totient is φ = 26101504.

The previous prime is 78550463. The next prime is 78550487. The reversal of 78550464 is 46405587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78550463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114667 + ... + 115349.

Almost surely, 2^78550464 is an apocalyptic number.

It is an amenable number.

78550464 is an abundant number, since it is smaller than the sum of its proper divisors (129932736).

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

78550464 is a wasteful number, since it uses less digits than its factorization.

78550464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 78550464 is about 8862.8699640692. The cubic root of 78550464 is about 428.2686175886.

The spelling of 78550464 in words is "seventy-eight million, five hundred fifty thousand, four hundred sixty-four".