398350815 has 32 divisors (see below), whose sum is σ = 660718080. Its totient is φ = 204699264.

The previous prime is 398350807. The next prime is 398350819. The reversal of 398350815 is 518053893.

It is not a de Polignac number, because 398350815 - 2³ = 398350807 is a prime.

It is a super-2 number, since 2×398350815² = 317366743622328450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398350819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 411462 + ... + 412428.

It is an arithmetic number, because the mean of its divisors is an integer number (20647440).

Almost surely, 2^398350815 is an apocalyptic number.

398350815 is a deficient number, since it is larger than the sum of its proper divisors (262367265).

398350815 is a wasteful number, since it uses less digits than its factorization.

398350815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 398350815 is about 19958.7277901173. The cubic root of 398350815 is about 735.7922966352.

The spelling of 398350815 in words is "three hundred ninety-eight million, three hundred fifty thousand, eight hundred fifteen".