398379040 has 24 divisors (see below), whose sum is σ = 941170860. Its totient is φ = 159351552.

The previous prime is 398379017. The next prime is 398379043. The reversal of 398379040 is 40973893.

It can be written as a sum of positive squares in 2 ways, for example, as 355397904 + 42981136 = 18852^2 + 6556^2 .

It is a super-2 number, since 2×398379040² = 317411719022643200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398379043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1244775 + ... + 1245094.

Almost surely, 2^398379040 is an apocalyptic number.

It is an amenable number.

398379040 is an abundant number, since it is smaller than the sum of its proper divisors (542791820).

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

398379040 is a wasteful number, since it uses less digits than its factorization.

398379040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489884 (or 2489876 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 398379040 is about 19959.4348617389. The cubic root of 398379040 is about 735.8096743220.

The spelling of 398379040 in words is "three hundred ninety-eight million, three hundred seventy-nine thousand, forty".