77189090 has 16 divisors (see below), whose sum is σ = 151571520. Its totient is φ = 28068720.

The previous prime is 77189069. The next prime is 77189093. The reversal of 77189090 is 9098177.

It is not an unprimeable number, because it can be changed into a prime (77189093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350750 + ... + 350969.

It is an arithmetic number, because the mean of its divisors is an integer number (9473220).

Almost surely, 2^77189090 is an apocalyptic number.

77189090 is a deficient number, since it is larger than the sum of its proper divisors (74382430).

77189090 is a wasteful number, since it uses less digits than its factorization.

77189090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701737.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 77189090 is about 8785.7321834893. The cubic root of 77189090 is about 425.7800483859.

The spelling of 77189090 in words is "seventy-seven million, one hundred eighty-nine thousand, ninety".