398599490 has 16 divisors (see below), whose sum is σ = 742220280. Its totient is φ = 153941760.

The previous prime is 398599471. The next prime is 398599507. The reversal of 398599490 is 94995893.

It can be written as a sum of positive squares in 4 ways, for example, as 278455969 + 120143521 = 16687^2 + 10961^2 .

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, 686951 + ... + 687530.

Almost surely, 2^398599490 is an apocalyptic number.

398599490 is a deficient number, since it is larger than the sum of its proper divisors (343620790).

398599490 is a wasteful number, since it uses less digits than its factorization.

398599490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374517.

The product of its (nonzero) digits is 3149280, while the sum is 56.

The square root of 398599490 is about 19964.9565489134. The cubic root of 398599490 is about 735.9453736729.

The spelling of 398599490 in words is "three hundred ninety-eight million, five hundred ninety-nine thousand, four hundred ninety".