398031930 has 24 divisors (see below), whose sum is σ = 1034883252. Its totient is φ = 106141824.

The previous prime is 398031913. The next prime is 398031937. The reversal of 398031930 is 39130893.

It can be written as a sum of positive squares in 2 ways, for example, as 394538769 + 3493161 = 19863^2 + 1869^2 .

It is not an unprimeable number, because it can be changed into a prime (398031937) 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, 2211199 + ... + 2211378.

Almost surely, 2^398031930 is an apocalyptic number.

398031930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398031930 is an abundant number, since it is smaller than the sum of its proper divisors (636851322).

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

398031930 is a wasteful number, since it uses less digits than its factorization.

398031930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4422590 (or 4422587 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 398031930 is about 19950.7375803503. The cubic root of 398031930 is about 735.5959071259.

The spelling of 398031930 in words is "three hundred ninety-eight million, thirty-one thousand, nine hundred thirty".