398920424 has 16 divisors (see below), whose sum is σ = 854829600. Its totient is φ = 170965872.

The previous prime is 398920411. The next prime is 398920427. The reversal of 398920424 is 424029893.

It is not an unprimeable number, because it can be changed into a prime (398920427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3561734 + ... + 3561845.

It is an arithmetic number, because the mean of its divisors is an integer number (53426850).

Almost surely, 2^398920424 is an apocalyptic number.

It is an amenable number.

398920424 is an abundant number, since it is smaller than the sum of its proper divisors (455909176).

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

398920424 is a wasteful number, since it uses less digits than its factorization.

398920424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7123592 (or 7123588 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 398920424 is about 19972.9923646909. The cubic root of 398920424 is about 736.1428371562.

The spelling of 398920424 in words is "three hundred ninety-eight million, nine hundred twenty thousand, four hundred twenty-four".