1398488031 has 8 divisors (see below), whose sum is σ = 2071834160. Its totient is φ = 932325336.

The previous prime is 1398488029. The next prime is 1398488041. The reversal of 1398488031 is 1308848931.

1398488031 is a `hidden beast` number, since 139 + 8 + 488 + 0 + 31 = 666.

It is not a de Polignac number, because 1398488031 - 2¹ = 1398488029 is a prime.

It is a super-2 number, since 2×1398488031² = 3911537545700513922, 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 (1398488041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25897900 + ... + 25897953.

It is an arithmetic number, because the mean of its divisors is an integer number (258979270).

Almost surely, 2^1398488031 is an apocalyptic number.

1398488031 is a deficient number, since it is larger than the sum of its proper divisors (673346129).

1398488031 is an equidigital number, since it uses as much as digits as its factorization.

1398488031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51795862 (or 51795856 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1398488031 is about 37396.3638740453. The cubic root of 1398488031 is about 1118.2860772560.

The spelling of 1398488031 in words is "one billion, three hundred ninety-eight million, four hundred eighty-eight thousand, thirty-one".