398565408 has 48 divisors (see below), whose sum is σ = 1107781920. Its totient is φ = 125039616.

The previous prime is 398565383. The next prime is 398565421. The reversal of 398565408 is 804565893.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 120478 + ... + 123741.

It is an arithmetic number, because the mean of its divisors is an integer number (23078790).

Almost surely, 2^398565408 is an apocalyptic number.

It is an amenable number.

398565408 is an abundant number, since it is smaller than the sum of its proper divisors (709216512).

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

398565408 is a wasteful number, since it uses less digits than its factorization.

398565408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244249 (or 244241 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The square root of 398565408 is about 19964.1029851080. The cubic root of 398565408 is about 735.9243975588.

The spelling of 398565408 in words is "three hundred ninety-eight million, five hundred sixty-five thousand, four hundred eight".