1398831136 has 24 divisors (see below), whose sum is σ = 2754787644. Its totient is φ = 699202560.

The previous prime is 1398831131. The next prime is 1398831149. The reversal of 1398831136 is 6311388931.

It can be written as a sum of positive squares in 2 ways, for example, as 1388307600 + 10523536 = 37260^2 + 3244^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1398831092 and 1398831101.

It is not an unprimeable number, because it can be changed into a prime (1398831131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184476 + ... + 191908.

Almost surely, 2^1398831136 is an apocalyptic number.

1398831136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1398831136 is a deficient number, since it is larger than the sum of its proper divisors (1355956508).

1398831136 is an equidigital number, since it uses as much as digits as its factorization.

1398831136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13324 (or 13316 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 1398831136 is about 37400.9510039518. The cubic root of 1398831136 is about 1118.3775231991.

The spelling of 1398831136 in words is "one billion, three hundred ninety-eight million, eight hundred thirty-one thousand, one hundred thirty-six".