398493420 has 48 divisors (see below), whose sum is σ = 1201613280. Its totient is φ = 98090496.

The previous prime is 398493397. The next prime is 398493439. The reversal of 398493420 is 24394893.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254665 + ... + 256224.

It is an arithmetic number, because the mean of its divisors is an integer number (25033610).

Almost surely, 2^398493420 is an apocalyptic number.

398493420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

398493420 is an abundant number, since it is smaller than the sum of its proper divisors (803119860).

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

398493420 is a wasteful number, since it uses less digits than its factorization.

398493420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510914 (or 510912 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 398493420 is about 19962.2999676891. The cubic root of 398493420 is about 735.8800878802.

The spelling of 398493420 in words is "three hundred ninety-eight million, four hundred ninety-three thousand, four hundred twenty".