398944590 has 64 divisors (see below), whose sum is σ = 1080552960. Its totient is φ = 93376640.

The previous prime is 398944589. The next prime is 398944603. The reversal of 398944590 is 95449893.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 11274 + ... + 30413.

It is an arithmetic number, because the mean of its divisors is an integer number (16883640).

Almost surely, 2^398944590 is an apocalyptic number.

398944590 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398944590 is an abundant number, since it is smaller than the sum of its proper divisors (681608370).

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

398944590 is a wasteful number, since it uses less digits than its factorization.

398944590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41737.

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

The square root of 398944590 is about 19973.5973224655. The cubic root of 398944590 is about 736.1577016651.

The spelling of 398944590 in words is "three hundred ninety-eight million, nine hundred forty-four thousand, five hundred ninety".