1540798866 has 48 divisors (see below), whose sum is σ = 3411066048. Its totient is φ = 502524000.

The previous prime is 1540798843. The next prime is 1540798873. The reversal of 1540798866 is 6688970451.

1540798866 is a `hidden beast` number, since 1 + 540 + 7 + 98 + 8 + 6 + 6 = 666.

It is a super-2 number, since 2×1540798866² = 4748122290933771912, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177876 + ... + 186336.

It is an arithmetic number, because the mean of its divisors is an integer number (71063876).

Almost surely, 2^1540798866 is an apocalyptic number.

1540798866 is an abundant number, since it is smaller than the sum of its proper divisors (1870267182).

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

1540798866 is a wasteful number, since it uses less digits than its factorization.

1540798866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8687 (or 8684 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 1540798866 is about 39253.0109163616. The cubic root of 1540798866 is about 1154.9999977512. Note that the first 5 decimals are identical.

The spelling of 1540798866 in words is "one billion, five hundred forty million, seven hundred ninety-eight thousand, eight hundred sixty-six".