398635590 has 16 divisors (see below), whose sum is σ = 956725488. Its totient is φ = 106302816.

The previous prime is 398635577. The next prime is 398635619. The reversal of 398635590 is 95536893.

It is a super-2 number, since 2×398635590² = 317820667229296200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6643897 + ... + 6643956.

It is an arithmetic number, because the mean of its divisors is an integer number (59795343).

Almost surely, 2^398635590 is an apocalyptic number.

398635590 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398635590 is an abundant number, since it is smaller than the sum of its proper divisors (558089898).

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

398635590 is a wasteful number, since it uses less digits than its factorization.

398635590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13287863.

The product of its (nonzero) digits is 874800, while the sum is 48.

The square root of 398635590 is about 19965.8606125556. The cubic root of 398635590 is about 735.9675904817.

The spelling of 398635590 in words is "three hundred ninety-eight million, six hundred thirty-five thousand, five hundred ninety".