1340391136 has 48 divisors (see below), whose sum is σ = 3119891040. Its totient is φ = 554641920.

The previous prime is 1340391127. The next prime is 1340391181. The reversal of 1340391136 is 6311930431.

It is a junction number, because it is equal to n+sod(n) for n = 1340391098 and 1340391107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96675 + ... + 109666.

It is an arithmetic number, because the mean of its divisors is an integer number (64997730).

Almost surely, 2^1340391136 is an apocalyptic number.

1340391136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1340391136 is an abundant number, since it is smaller than the sum of its proper divisors (1779499904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1340391136 is a wasteful number, since it uses less digits than its factorization.

1340391136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206387 (or 206379 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 1340391136 is about 36611.3525562769. The cubic root of 1340391136 is about 1102.5810289700.

The spelling of 1340391136 in words is "one billion, three hundred forty million, three hundred ninety-one thousand, one hundred thirty-six".