9904977720 has 144 divisors (see below), whose sum is σ = 35383846680. Its totient is φ = 2401196160.

The previous prime is 9904977713. The next prime is 9904977721. The reversal of 9904977720 is 277794099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9904977721) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 70134 + ... + 157253.

Almost surely, 2^9904977720 is an apocalyptic number.

9904977720 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9904977720 is an abundant number, since it is smaller than the sum of its proper divisors (25478868960).

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

9904977720 is a wasteful number, since it uses less digits than its factorization.

9904977720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227426 (or 227408 counting only the distinct ones).

The product of its (nonzero) digits is 2000376, while the sum is 54.

The square root of 9904977720 is about 99523.7545513633. The cubic root of 9904977720 is about 2147.5889843294.

The spelling of 9904977720 in words is "nine billion, nine hundred four million, nine hundred seventy-seven thousand, seven hundred twenty".