398205575 has 12 divisors (see below), whose sum is σ = 494062128. Its totient is φ = 318379200.

The previous prime is 398205557. The next prime is 398205617. The reversal of 398205575 is 575502893.

It is not a de Polignac number, because 398205575 - 2¹⁸ = 397943431 is a prime.

It is a super-2 number, since 2×398205575² = 317135359922161250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53534 + ... + 60516.

It is an arithmetic number, because the mean of its divisors is an integer number (41171844).

Almost surely, 2^398205575 is an apocalyptic number.

398205575 is a deficient number, since it is larger than the sum of its proper divisors (95856553).

398205575 is a wasteful number, since it uses less digits than its factorization.

398205575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9274 (or 9269 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 44.

The square root of 398205575 is about 19955.0889499396. The cubic root of 398205575 is about 735.7028616784.

The spelling of 398205575 in words is "three hundred ninety-eight million, two hundred five thousand, five hundred seventy-five".