1540013990 has 16 divisors (see below), whose sum is σ = 2892548448. Its totient is φ = 589222656.

The previous prime is 1540013987. The next prime is 1540014017. The reversal of 1540013990 is 993100451.

It is a Curzon number.

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, 3347627 + ... + 3348086.

It is an arithmetic number, because the mean of its divisors is an integer number (180784278).

Almost surely, 2^1540013990 is an apocalyptic number.

1540013990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1540013990 is a deficient number, since it is larger than the sum of its proper divisors (1352534458).

1540013990 is a wasteful number, since it uses less digits than its factorization.

1540013990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6695743.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 1540013990 is about 39243.0119893976. The cubic root of 1540013990 is about 1154.8038471764.

The spelling of 1540013990 in words is "one billion, five hundred forty million, thirteen thousand, nine hundred ninety".