398494590 has 64 divisors (see below), whose sum is σ = 1044138816. Its totient is φ = 96740352.

The previous prime is 398494589. The next prime is 398494609. The reversal of 398494590 is 95494893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21472 + ... + 35468.

It is an arithmetic number, because the mean of its divisors is an integer number (16314669).

Almost surely, 2^398494590 is an apocalyptic number.

398494590 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 398494590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522069408).

398494590 is an abundant number, since it is smaller than the sum of its proper divisors (645644226).

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

398494590 is a wasteful number, since it uses less digits than its factorization.

398494590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14093.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 398494590 is about 19962.3292729080. The cubic root of 398494590 is about 735.8808080752.

The spelling of 398494590 in words is "three hundred ninety-eight million, four hundred ninety-four thousand, five hundred ninety".