398097420 has 48 divisors (see below), whose sum is σ = 1273913088. Its totient is φ = 90993600.

The previous prime is 398097389. The next prime is 398097421. The reversal of 398097420 is 24790893.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (398097421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473506 + ... + 474345.

It is an arithmetic number, because the mean of its divisors is an integer number (26539856).

Almost surely, 2^398097420 is an apocalyptic number.

398097420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

398097420 is an abundant number, since it is smaller than the sum of its proper divisors (875815668).

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

398097420 is a wasteful number, since it uses less digits than its factorization.

398097420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947870 (or 947868 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 398097420 is about 19952.3788055460. The cubic root of 398097420 is about 735.6362485578.

The spelling of 398097420 in words is "three hundred ninety-eight million, ninety-seven thousand, four hundred twenty".