1138860009 has 27 divisors (see below), whose sum is σ = 1914786237. Its totient is φ = 650372184.

The previous prime is 1138860001. The next prime is 1138860029. The reversal of 1138860009 is 9000688311.

The square root of 1138860009 is 33747.

It is a perfect power (a square), and thus also a powerful number.

1138860009 is a `hidden beast` number, since 11 + 38 + 8 + 600 + 0 + 9 = 666.

It is not a de Polignac number, because 1138860009 - 2³ = 1138860001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1138860001) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 707884 + ... + 709490.

Almost surely, 2^1138860009 is an apocalyptic number.

1138860009 is the 33747-th square number.

1138860009 is the 16874-th centered octagonal number.

It is an amenable number.

1138860009 is a deficient number, since it is larger than the sum of its proper divisors (775926228).

1138860009 is an frugal number, since it uses more digits than its factorization.

1138860009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234 (or 1617 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The cubic root of 1138860009 is about 1044.2955987949.

Multiplying 1138860009 by its sum of digits (36), we get a square (40998960324 = 202482²).

The spelling of 1138860009 in words is "one billion, one hundred thirty-eight million, eight hundred sixty thousand, nine".