398152257 has 32 divisors (see below), whose sum is σ = 576259200. Its totient is φ = 243606528.

The previous prime is 398152247. The next prime is 398152273. The reversal of 398152257 is 752251893.

It is a happy number.

It is not a de Polignac number, because 398152257 - 2⁶ = 398152193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398152247) 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, 371919 + ... + 372987.

It is an arithmetic number, because the mean of its divisors is an integer number (18008100).

Almost surely, 2^398152257 is an apocalyptic number.

It is an amenable number.

398152257 is a deficient number, since it is larger than the sum of its proper divisors (178106943).

398152257 is a wasteful number, since it uses less digits than its factorization.

398152257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265.

The product of its digits is 151200, while the sum is 42.

The square root of 398152257 is about 19953.7529552713. The cubic root of 398152257 is about 735.6700244050.

The spelling of 398152257 in words is "three hundred ninety-eight million, one hundred fifty-two thousand, two hundred fifty-seven".