398667490 has 32 divisors (see below), whose sum is σ = 781507440. Its totient is φ = 145542144.

The previous prime is 398667473. The next prime is 398667517. The reversal of 398667490 is 94766893.

It can be written as a sum of positive squares in 8 ways, for example, as 67026969 + 331640521 = 8187^2 + 18211^2 .

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, 5659 + ... + 28798.

Almost surely, 2^398667490 is an apocalyptic number.

398667490 is a deficient number, since it is larger than the sum of its proper divisors (382839950).

398667490 is a wasteful number, since it uses less digits than its factorization.

398667490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34566.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 398667490 is about 19966.6594602102. The cubic root of 398667490 is about 735.9872213932.

The spelling of 398667490 in words is "three hundred ninety-eight million, six hundred sixty-seven thousand, four hundred ninety".