398947590 has 24 divisors (see below), whose sum is σ = 1037263968. Its totient is φ = 106386000.

The previous prime is 398947559. The next prime is 398947597. The reversal of 398947590 is 95749893.

398947590 is a `hidden beast` number, since 3 + 9 + 8 + 9 + 47 + 590 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398947597) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2216286 + ... + 2216465.

It is an arithmetic number, because the mean of its divisors is an integer number (43219332).

Almost surely, 2^398947590 is an apocalyptic number.

398947590 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398947590 is an abundant number, since it is smaller than the sum of its proper divisors (638316378).

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

398947590 is a wasteful number, since it uses less digits than its factorization.

398947590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432764 (or 4432761 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 398947590 is about 19973.6724214652. The cubic root of 398947590 is about 736.1595469235.

The spelling of 398947590 in words is "three hundred ninety-eight million, nine hundred forty-seven thousand, five hundred ninety".