77722998 has 16 divisors (see below), whose sum is σ = 155895600. Its totient is φ = 25832736.

The previous prime is 77722993. The next prime is 77722999. The reversal of 77722998 is 89922777.

It is a self number, because there is not a number n which added to its sum of digits gives 77722998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77722993) 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, 16465 + ... + 20652.

It is an arithmetic number, because the mean of its divisors is an integer number (9743475).

Almost surely, 2^77722998 is an apocalyptic number.

77722998 is an abundant number, since it is smaller than the sum of its proper divisors (78172602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77722998 is a wasteful number, since it uses less digits than its factorization.

77722998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37471.

The product of its digits is 889056, while the sum is 51.

The square root of 77722998 is about 8816.0647683646. The cubic root of 77722998 is about 426.7594840659.

The spelling of 77722998 in words is "seventy-seven million, seven hundred twenty-two thousand, nine hundred ninety-eight".