398322490 has 16 divisors (see below), whose sum is σ = 717635880. Its totient is φ = 159183360.

The previous prime is 398322481. The next prime is 398322493. The reversal of 398322490 is 94223893.

It can be written as a sum of positive squares in 4 ways, for example, as 162792081 + 235530409 = 12759^2 + 15347^2 .

It is not an unprimeable number, because it can be changed into a prime (398322493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6351 + ... + 28930.

Almost surely, 2^398322490 is an apocalyptic number.

398322490 is a deficient number, since it is larger than the sum of its proper divisors (319313390).

398322490 is a wasteful number, since it uses less digits than its factorization.

398322490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36417.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 398322490 is about 19958.0181881869. The cubic root of 398322490 is about 735.7748565547.

The spelling of 398322490 in words is "three hundred ninety-eight million, three hundred twenty-two thousand, four hundred ninety".