78874564 has 12 divisors (see below), whose sum is σ = 138246444. Its totient is φ = 39375584.

The previous prime is 78874553. The next prime is 78874573. The reversal of 78874564 is 46547887.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19430464 + 59444100 = 4408^2 + 7710^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12487 + ... + 17710.

It is an arithmetic number, because the mean of its divisors is an integer number (11520537).

Almost surely, 2^78874564 is an apocalyptic number.

It is an amenable number.

78874564 is a deficient number, since it is larger than the sum of its proper divisors (59371880).

78874564 is a wasteful number, since it uses less digits than its factorization.

78874564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30854 (or 30852 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 49.

The square root of 78874564 is about 8881.1352877884. The cubic root of 78874564 is about 428.8568228816.

The spelling of 78874564 in words is "seventy-eight million, eight hundred seventy-four thousand, five hundred sixty-four".