1540440499 has 64 divisors (see below), whose sum is σ = 1912135680. Its totient is φ = 1226741760.

The previous prime is 1540440497. The next prime is 1540440509. The reversal of 1540440499 is 9940440451.

It is not a de Polignac number, because 1540440499 - 2¹ = 1540440497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1540440497) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14955682 + ... + 14955784.

It is an arithmetic number, because the mean of its divisors is an integer number (29877120).

Almost surely, 2^1540440499 is an apocalyptic number.

1540440499 is a deficient number, since it is larger than the sum of its proper divisors (371695181).

1540440499 is a wasteful number, since it uses less digits than its factorization.

1540440499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 1540440499 is about 39248.4458163632. The cubic root of 1540440499 is about 1154.9104455092.

The spelling of 1540440499 in words is "one billion, five hundred forty million, four hundred forty thousand, four hundred ninety-nine".