398049090 has 32 divisors (see below), whose sum is σ = 955843200. Its totient is φ = 106088064.

The previous prime is 398049089. The next prime is 398049131. The reversal of 398049090 is 90940893.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101547 + ... + 105393.

It is an arithmetic number, because the mean of its divisors is an integer number (29870100).

Almost surely, 2^398049090 is an apocalyptic number.

398049090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398049090 is an abundant number, since it is smaller than the sum of its proper divisors (557794110).

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

398049090 is a wasteful number, since it uses less digits than its factorization.

398049090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7306.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 398049090 is about 19951.1676350032. The cubic root of 398049090 is about 735.6064780068.

The spelling of 398049090 in words is "three hundred ninety-eight million, forty-nine thousand, ninety".