140005636 has 12 divisors (see below), whose sum is σ = 245338828. Its totient is φ = 69908832.

The previous prime is 140005601. The next prime is 140005637. The reversal of 140005636 is 636500041.

It can be written as a sum of positive squares in 2 ways, for example, as 115562500 + 24443136 = 10750^2 + 4944^2 .

It is a super-2 number, since 2×140005636² = 39203156223528992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 140005636.

It is not an unprimeable number, because it can be changed into a prime (140005637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20091 + ... + 26146.

Almost surely, 2^140005636 is an apocalyptic number.

It is an amenable number.

140005636 is a deficient number, since it is larger than the sum of its proper divisors (105333192).

140005636 is a wasteful number, since it uses less digits than its factorization.

140005636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46998 (or 46996 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 140005636 is about 11832.3977282713. The cubic root of 140005636 is about 519.2563779242.

Adding to 140005636 its reverse (636500041), we get a palindrome (776505677).

The spelling of 140005636 in words is "one hundred forty million, five thousand, six hundred thirty-six".