140621636 has 24 divisors (see below), whose sum is σ = 252703584. Its totient is φ = 68429120.

The previous prime is 140621627. The next prime is 140621669. The reversal of 140621636 is 636126041.

It is a happy number.

It is a super-2 number, since 2×140621636² = 39548889022632992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140621599 and 140621608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91571 + ... + 93093.

It is an arithmetic number, because the mean of its divisors is an integer number (10529316).

Almost surely, 2^140621636 is an apocalyptic number.

It is an amenable number.

140621636 is a deficient number, since it is larger than the sum of its proper divisors (112081948).

140621636 is a wasteful number, since it uses less digits than its factorization.

140621636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131 (or 2129 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 140621636 is about 11858.3993860892. The cubic root of 140621636 is about 520.0168091213.

Adding to 140621636 its reverse (636126041), we get a palindrome (776747677).

The spelling of 140621636 in words is "one hundred forty million, six hundred twenty-one thousand, six hundred thirty-six".