1540831138 has 32 divisors (see below), whose sum is σ = 2930411520. Its totient is φ = 590145360.

The previous prime is 1540831081. The next prime is 1540831141. The reversal of 1540831138 is 8311380451.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75706 + ... + 93877.

It is an arithmetic number, because the mean of its divisors is an integer number (91575360).

Almost surely, 2^1540831138 is an apocalyptic number.

1540831138 is a deficient number, since it is larger than the sum of its proper divisors (1389580382).

1540831138 is a wasteful number, since it uses less digits than its factorization.

1540831138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169662.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1540831138 is about 39253.4219909551. The cubic root of 1540831138 is about 1155.0080615118.

The spelling of 1540831138 in words is "one billion, five hundred forty million, eight hundred thirty-one thousand, one hundred thirty-eight".