1540974906 has 24 divisors (see below), whose sum is σ = 3339576084. Its totient is φ = 513535680.

The previous prime is 1540974893. The next prime is 1540974913. The reversal of 1540974906 is 6094790451.

1540974906 is a `hidden beast` number, since 154 + 0 + 9 + 7 + 490 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1540955025 + 19881 = 39255^2 + 141^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98580 + ... + 113136.

Almost surely, 2^1540974906 is an apocalyptic number.

1540974906 is an abundant number, since it is smaller than the sum of its proper divisors (1798601178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1540974906 is a wasteful number, since it uses less digits than its factorization.

1540974906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20446 (or 20443 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1540974906 is about 39255.2532280713. The cubic root of 1540974906 is about 1155.0439832579.

The spelling of 1540974906 in words is "one billion, five hundred forty million, nine hundred seventy-four thousand, nine hundred six".