1398008931 has 48 divisors (see below), whose sum is σ = 2167264512. Its totient is φ = 794622400.

The previous prime is 1398008917. The next prime is 1398008959.

It is a happy number.

1398008931 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1398008931 - 2⁹ = 1398008419 is a prime.

It is a super-2 number, since 2×1398008931² = 3908857942311525522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1398008971) 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 47 ways as a sum of consecutive naturals, for example, 924466 + ... + 925976.

It is an arithmetic number, because the mean of its divisors is an integer number (45151344).

Almost surely, 2^1398008931 is an apocalyptic number.

1398008931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1398008931 is a deficient number, since it is larger than the sum of its proper divisors (769255581).

1398008931 is a wasteful number, since it uses less digits than its factorization.

1398008931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1601 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 1398008931 is about 37389.9576223349. The cubic root of 1398008931 is about 1118.1583602642.

The spelling of 1398008931 in words is "one billion, three hundred ninety-eight million, eight thousand, nine hundred thirty-one".