1540442164 has 12 divisors (see below), whose sum is σ = 2768632804. Its totient is φ = 749404224.

The previous prime is 1540442161. The next prime is 1540442177. The reversal of 1540442164 is 4612440451.

It can be written as a sum of positive squares in 2 ways, for example, as 1004890000 + 535552164 = 31700^2 + 23142^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540442161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5204049 + ... + 5204344.

Almost surely, 2^1540442164 is an apocalyptic number.

It is an amenable number.

1540442164 is a deficient number, since it is larger than the sum of its proper divisors (1228190640).

1540442164 is a wasteful number, since it uses less digits than its factorization.

1540442164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10408434 (or 10408432 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 1540442164 is about 39248.4670273885. The cubic root of 1540442164 is about 1154.9108616078.

The spelling of 1540442164 in words is "one billion, five hundred forty million, four hundred forty-two thousand, one hundred sixty-four".