1540013994 has 24 divisors (see below), whose sum is σ = 3337899552. Its totient is φ = 513153000.

The previous prime is 1540013987. The next prime is 1540014017. The reversal of 1540013994 is 4993100451.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41619 + ... + 69369.

It is an arithmetic number, because the mean of its divisors is an integer number (139079148).

Almost surely, 2^1540013994 is an apocalyptic number.

1540013994 is an abundant number, since it is smaller than the sum of its proper divisors (1797885558).

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

1540013994 is a wasteful number, since it uses less digits than its factorization.

1540013994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30842 (or 30839 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1540013994 is about 39243.0120403620. The cubic root of 1540013994 is about 1154.8038481762.

The spelling of 1540013994 in words is "one billion, five hundred forty million, thirteen thousand, nine hundred ninety-four".