398983877431 has 8 divisors (see below), whose sum is σ = 412761451680. Its totient is φ = 385207603872.

The previous prime is 398983877419. The next prime is 398983877441. The reversal of 398983877431 is 134778389893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398983877431 is a prime.

It is a super-2 number, since 2×398983877431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398983877441) 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, 320686 + ... + 949108.

It is an arithmetic number, because the mean of its divisors is an integer number (51595181460).

Almost surely, 2^398983877431 is an apocalyptic number.

398983877431 is a deficient number, since it is larger than the sum of its proper divisors (13777574249).

398983877431 is a wasteful number, since it uses less digits than its factorization.

398983877431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650345.

The product of its digits is 219469824, while the sum is 70.

The spelling of 398983877431 in words is "three hundred ninety-eight billion, nine hundred eighty-three million, eight hundred seventy-seven thousand, four hundred thirty-one".