398509824 has 36 divisors (see below), whose sum is σ = 1060619336. Its totient is φ = 132836352.

The previous prime is 398509823. The next prime is 398509829. The reversal of 398509824 is 428905893.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398509823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258679 + ... + 260214.

Almost surely, 2^398509824 is an apocalyptic number.

It is an amenable number.

398509824 is an abundant number, since it is smaller than the sum of its proper divisors (662109512).

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

398509824 is an equidigital number, since it uses as much as digits as its factorization.

398509824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518912 (or 518898 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 398509824 is about 19962.7108379599. The cubic root of 398509824 is about 735.8901852542.

The spelling of 398509824 in words is "three hundred ninety-eight million, five hundred nine thousand, eight hundred twenty-four".