78464560 has 40 divisors (see below), whose sum is σ = 183269520. Its totient is φ = 31241472.

The previous prime is 78464549. The next prime is 78464563. The reversal of 78464560 is 6546487.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78464563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16179 + ... + 20461.

It is an arithmetic number, because the mean of its divisors is an integer number (4581738).

Almost surely, 2^78464560 is an apocalyptic number.

It is an amenable number.

78464560 is an abundant number, since it is smaller than the sum of its proper divisors (104804960).

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

78464560 is a wasteful number, since it uses less digits than its factorization.

78464560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525 (or 4519 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 78464560 is about 8858.0223526473. The cubic root of 78464560 is about 428.1124402517.

The spelling of 78464560 in words is "seventy-eight million, four hundred sixty-four thousand, five hundred sixty".