400898979 has 12 divisors (see below), whose sum is σ = 623620816. Its totient is φ = 246706992.

The previous prime is 400898951. The next prime is 400899007. The reversal of 400898979 is 979898004.

It is an interprime number because it is at equal distance from previous prime (400898951) and next prime (400899007).

It is a de Polignac number, because none of the positive numbers 2^k-400898979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400890979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1713127 + ... + 1713360.

Almost surely, 2^400898979 is an apocalyptic number.

400898979 is a deficient number, since it is larger than the sum of its proper divisors (222721837).

400898979 is a wasteful number, since it uses less digits than its factorization.

400898979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3426506 (or 3426503 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 400898979 is about 20022.4618616193. The cubic root of 400898979 is about 737.3578645553.

The spelling of 400898979 in words is "four hundred million, eight hundred ninety-eight thousand, nine hundred seventy-nine".