398249995 has 32 divisors (see below), whose sum is σ = 563661504. Its totient is φ = 266304000.

The previous prime is 398249993. The next prime is 398250001. The reversal of 398249995 is 599942893.

It is not a de Polignac number, because 398249995 - 2¹ = 398249993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398249993) 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, 208545 + ... + 210445.

It is an arithmetic number, because the mean of its divisors is an integer number (17614422).

Almost surely, 2^398249995 is an apocalyptic number.

398249995 is a deficient number, since it is larger than the sum of its proper divisors (165411509).

398249995 is a wasteful number, since it uses less digits than its factorization.

398249995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223.

The product of its digits is 6298560, while the sum is 58.

The square root of 398249995 is about 19956.2019182008. The cubic root of 398249995 is about 735.7302166496.

The spelling of 398249995 in words is "three hundred ninety-eight million, two hundred forty-nine thousand, nine hundred ninety-five".