398097868 has 24 divisors (see below), whose sum is σ = 798471072. Its totient is φ = 170125824.

The previous prime is 398097829. The next prime is 398097907. The reversal of 398097868 is 868790893.

It is an interprime number because it is at equal distance from previous prime (398097829) and next prime (398097907).

It is a super-2 number, since 2×398097868² = 316963825012290848, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10255 + ... + 30022.

It is an arithmetic number, because the mean of its divisors is an integer number (33269628).

Almost surely, 2^398097868 is an apocalyptic number.

It is an amenable number.

398097868 is an abundant number, since it is smaller than the sum of its proper divisors (400373204).

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

398097868 is a wasteful number, since it uses less digits than its factorization.

398097868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40641 (or 40639 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 58.

The square root of 398097868 is about 19952.3900322743. The cubic root of 398097868 is about 735.6365245078.

The spelling of 398097868 in words is "three hundred ninety-eight million, ninety-seven thousand, eight hundred sixty-eight".