78349564 has 24 divisors (see below), whose sum is σ = 141019200. Its totient is φ = 38070336.

The previous prime is 78349547. The next prime is 78349571. The reversal of 78349564 is 46594387.

It is a super-2 number, since 2×78349564² = 12277308357980192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26614 + ... + 29410.

It is an arithmetic number, because the mean of its divisors is an integer number (5875800).

Almost surely, 2^78349564 is an apocalyptic number.

It is an amenable number.

78349564 is a deficient number, since it is larger than the sum of its proper divisors (62669636).

78349564 is a wasteful number, since it uses less digits than its factorization.

78349564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997 (or 2995 counting only the distinct ones).

The product of its digits is 725760, while the sum is 46.

The square root of 78349564 is about 8851.5289074826. The cubic root of 78349564 is about 427.9031938160.

The spelling of 78349564 in words is "seventy-eight million, three hundred forty-nine thousand, five hundred sixty-four".