77989804 has 12 divisors (see below), whose sum is σ = 136544184. Its totient is φ = 38977184.

The previous prime is 77989801. The next prime is 77989817. The reversal of 77989804 is 40898977.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77989801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13899 + ... + 18685.

It is an arithmetic number, because the mean of its divisors is an integer number (11378682).

Almost surely, 2^77989804 is an apocalyptic number.

It is an amenable number.

77989804 is a deficient number, since it is larger than the sum of its proper divisors (58554380).

77989804 is a wasteful number, since it uses less digits than its factorization.

77989804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8864 (or 8862 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 77989804 is about 8831.1836126309. The cubic root of 77989804 is about 427.2472502526.

The spelling of 77989804 in words is "seventy-seven million, nine hundred eighty-nine thousand, eight hundred four".