398332590 has 16 divisors (see below), whose sum is σ = 955998288. Its totient is φ = 106222016.

The previous prime is 398332553. The next prime is 398332591. The reversal of 398332590 is 95233893.

It is a super-2 number, since 2×398332590² = 317337704512216200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398332591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6638847 + ... + 6638906.

It is an arithmetic number, because the mean of its divisors is an integer number (59749893).

Almost surely, 2^398332590 is an apocalyptic number.

398332590 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398332590 is an abundant number, since it is smaller than the sum of its proper divisors (557665698).

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

398332590 is a wasteful number, since it uses less digits than its factorization.

398332590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13277763.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 398332590 is about 19958.2712177182. The cubic root of 398332590 is about 735.7810753544.

The spelling of 398332590 in words is "three hundred ninety-eight million, three hundred thirty-two thousand, five hundred ninety".