398980929231 has 16 divisors (see below), whose sum is σ = 600772743520. Its totient is φ = 261626837760.

The previous prime is 398980929203. The next prime is 398980929239. The reversal of 398980929231 is 132929089893.

398980929231 is a `hidden beast` number, since 398 + 9 + 8 + 0 + 9 + 2 + 9 + 231 = 666.

It is not a de Polignac number, because 398980929231 - 2⁶ = 398980929167 is a prime.

It is a super-2 number, since 2×398980929231² (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 (398980929239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121121890 + ... + 121125183.

It is an arithmetic number, because the mean of its divisors is an integer number (37548296470).

Almost surely, 2^398980929231 is an apocalyptic number.

398980929231 is a deficient number, since it is larger than the sum of its proper divisors (201791814289).

398980929231 is a wasteful number, since it uses less digits than its factorization.

398980929231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242247143 (or 242247137 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 63.

The spelling of 398980929231 in words is "three hundred ninety-eight billion, nine hundred eighty million, nine hundred twenty-nine thousand, two hundred thirty-one".