1540455634 has 12 divisors (see below), whose sum is σ = 2316329406. Its totient is φ = 768350352.

The previous prime is 1540455599. The next prime is 1540455661. The reversal of 1540455634 is 4365540451.

It can be written as a sum of positive squares in only one way, i.e., 1406475009 + 133980625 = 37503^2 + 11575^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1540455593 and 1540455602.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 426942 + ... + 430534.

Almost surely, 2^1540455634 is an apocalyptic number.

1540455634 is a deficient number, since it is larger than the sum of its proper divisors (775873772).

1540455634 is an frugal number, since it uses more digits than its factorization.

1540455634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4521 (or 4058 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The square root of 1540455634 is about 39248.6386260721. The cubic root of 1540455634 is about 1154.9142278716.

The spelling of 1540455634 in words is "one billion, five hundred forty million, four hundred fifty-five thousand, six hundred thirty-four".