1138790169 has 72 divisors (see below), whose sum is σ = 1932676200. Its totient is φ = 643399680.

The previous prime is 1138790143. The next prime is 1138790179. The reversal of 1138790169 is 9610978311.

It can be written as a sum of positive squares in 4 ways, for example, as 406546569 + 732243600 = 20163^2 + 27060^2 .

It is not a de Polignac number, because 1138790169 - 2²¹ = 1136693017 is a prime.

It is a super-2 number, since 2×1138790169² = 2593686098022097122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1138790179) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2536057 + ... + 2536505.

It is an arithmetic number, because the mean of its divisors is an integer number (26842725).

Almost surely, 2^1138790169 is an apocalyptic number.

It is an amenable number.

1138790169 is a deficient number, since it is larger than the sum of its proper divisors (793886031).

1138790169 is a wasteful number, since it uses less digits than its factorization.

1138790169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 1138790169 is about 33745.9652254903. The cubic root of 1138790169 is about 1044.2742513963.

The spelling of 1138790169 in words is "one billion, one hundred thirty-eight million, seven hundred ninety thousand, one hundred sixty-nine".