1540431412 has 24 divisors (see below), whose sum is σ = 2907030056. Its totient is φ = 710011008.

The previous prime is 1540431401. The next prime is 1540431419. The reversal of 1540431412 is 2141340451.

It can be written as a sum of positive squares in 4 ways, for example, as 432473616 + 1107957796 = 20796^2 + 33286^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540431419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19798 + ... + 58930.

Almost surely, 2^1540431412 is an apocalyptic number.

It is an amenable number.

1540431412 is a deficient number, since it is larger than the sum of its proper divisors (1366598644).

1540431412 is a wasteful number, since it uses less digits than its factorization.

1540431412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39907 (or 39905 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1540431412 is about 39248.3300536469. The cubic root of 1540431412 is about 1154.9081745805.

Adding to 1540431412 its reverse (2141340451), we get a palindrome (3681771863).

The spelling of 1540431412 in words is "one billion, five hundred forty million, four hundred thirty-one thousand, four hundred twelve".