399198275 has 24 divisors (see below), whose sum is σ = 571034880. Its totient is φ = 271164960.

The previous prime is 399198271. The next prime is 399198277. The reversal of 399198275 is 572891993.

It is not a de Polignac number, because 399198275 - 2² = 399198271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399198271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8066 + ... + 29384.

It is an arithmetic number, because the mean of its divisors is an integer number (23793120).

Almost surely, 2^399198275 is an apocalyptic number.

399198275 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

399198275 is a deficient number, since it is larger than the sum of its proper divisors (171836605).

399198275 is a wasteful number, since it uses less digits than its factorization.

399198275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21443 (or 21438 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 53.

The square root of 399198275 is about 19979.9468217511. The cubic root of 399198275 is about 736.3137071193.

The spelling of 399198275 in words is "three hundred ninety-nine million, one hundred ninety-eight thousand, two hundred seventy-five".