398595340 has 48 divisors (see below), whose sum is σ = 983394720. Its totient is φ = 133793280.

The previous prime is 398595283. The next prime is 398595341. The reversal of 398595340 is 43595893.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (398595341) 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, 66825 + ... + 72544.

It is an arithmetic number, because the mean of its divisors is an integer number (20487390).

Almost surely, 2^398595340 is an apocalyptic number.

It is an amenable number.

398595340 is an abundant number, since it is smaller than the sum of its proper divisors (584799380).

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

398595340 is a wasteful number, since it uses less digits than its factorization.

398595340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139402 (or 139400 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 46.

The square root of 398595340 is about 19964.8526165359. The cubic root of 398595340 is about 735.9428195771.

The spelling of 398595340 in words is "three hundred ninety-eight million, five hundred ninety-five thousand, three hundred forty".