398939020 has 24 divisors (see below), whose sum is σ = 858207168. Its totient is φ = 155683200.

The previous prime is 398938999. The next prime is 398939053. The reversal of 398939020 is 20939893.

It is a happy number.

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, 242436 + ... + 244075.

It is an arithmetic number, because the mean of its divisors is an integer number (35758632).

Almost surely, 2^398939020 is an apocalyptic number.

It is an amenable number.

398939020 is an abundant number, since it is smaller than the sum of its proper divisors (459268148).

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

398939020 is a wasteful number, since it uses less digits than its factorization.

398939020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486561 (or 486559 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 398939020 is about 19973.4578879071. The cubic root of 398939020 is about 736.1542756108.

The spelling of 398939020 in words is "three hundred ninety-eight million, nine hundred thirty-nine thousand, twenty".