77989874 has 16 divisors (see below), whose sum is σ = 123837120. Its totient is φ = 36773520.

The previous prime is 77989867. The next prime is 77989883. The reversal of 77989874 is 47898977.

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 7 ways as a sum of consecutive naturals, for example, 13142 + ... + 18129.

It is an arithmetic number, because the mean of its divisors is an integer number (7739820).

Almost surely, 2^77989874 is an apocalyptic number.

77989874 is a deficient number, since it is larger than the sum of its proper divisors (45847246).

77989874 is a wasteful number, since it uses less digits than its factorization.

77989874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31345.

The product of its digits is 7112448, while the sum is 59.

The square root of 77989874 is about 8831.1875758586. The cubic root of 77989874 is about 427.2473780783.

The spelling of 77989874 in words is "seventy-seven million, nine hundred eighty-nine thousand, eight hundred seventy-four".