398262999 has 16 divisors (see below), whose sum is σ = 535584608. Its totient is φ = 263233152.

The previous prime is 398262989. The next prime is 398263037. The reversal of 398262999 is 999262893.

It is not a de Polignac number, because 398262999 - 2¹³ = 398254807 is a prime.

It is a super-2 number, since 2×398262999² = 317226832744948002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398262929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355989 + ... + 357105.

It is an arithmetic number, because the mean of its divisors is an integer number (33474038).

Almost surely, 2^398262999 is an apocalyptic number.

398262999 is a deficient number, since it is larger than the sum of its proper divisors (137321609).

398262999 is a wasteful number, since it uses less digits than its factorization.

398262999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034.

The product of its digits is 3779136, while the sum is 57.

The square root of 398262999 is about 19956.5277290414. The cubic root of 398262999 is about 735.7382244602.

The spelling of 398262999 in words is "three hundred ninety-eight million, two hundred sixty-two thousand, nine hundred ninety-nine".