398739270 has 64 divisors (see below), whose sum is σ = 1033067520. Its totient is φ = 98195328.

The previous prime is 398739259. The next prime is 398739277. The reversal of 398739270 is 72937893.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398739277) 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, 10047 + ... + 29973.

It is an arithmetic number, because the mean of its divisors is an integer number (16141680).

Almost surely, 2^398739270 is an apocalyptic number.

398739270 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 398739270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (516533760).

398739270 is an abundant number, since it is smaller than the sum of its proper divisors (634328250).

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

398739270 is a wasteful number, since it uses less digits than its factorization.

398739270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19989.

The product of its (nonzero) digits is 571536, while the sum is 48.

The square root of 398739270 is about 19968.4568757829. The cubic root of 398739270 is about 736.0313901920.

The spelling of 398739270 in words is "three hundred ninety-eight million, seven hundred thirty-nine thousand, two hundred seventy".