398840970 has 64 divisors (see below), whose sum is σ = 1099215360. Its totient is φ = 91598400.

The previous prime is 398840969. The next prime is 398840971. The reversal of 398840970 is 79048893.

It is an interprime number because it is at equal distance from previous prime (398840969) and next prime (398840971).

It is not an unprimeable number, because it can be changed into a prime (398840971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25536 + ... + 38075.

It is an arithmetic number, because the mean of its divisors is an integer number (17175240).

Almost surely, 2^398840970 is an apocalyptic number.

398840970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398840970 is an abundant number, since it is smaller than the sum of its proper divisors (700374390).

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

398840970 is a wasteful number, since it uses less digits than its factorization.

398840970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63651.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 398840970 is about 19971.0032296828. The cubic root of 398840970 is about 736.0939607612.

The spelling of 398840970 in words is "three hundred ninety-eight million, eight hundred forty thousand, nine hundred seventy".