140256644 has 24 divisors (see below), whose sum is σ = 276998400. Its totient is φ = 61554080.

The previous prime is 140256643. The next prime is 140256653. The reversal of 140256644 is 446652041.

It is a super-2 number, since 2×140256644² = 39343852372285472, 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 140256644.

It is not an unprimeable number, because it can be changed into a prime (140256643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53684 + ... + 56235.

It is an arithmetic number, because the mean of its divisors is an integer number (11541600).

Almost surely, 2^140256644 is an apocalyptic number.

It is an amenable number.

140256644 is a deficient number, since it is larger than the sum of its proper divisors (136741756).

140256644 is a wasteful number, since it uses less digits than its factorization.

140256644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109963 (or 109961 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 140256644 is about 11842.9997889048. Note that the first 3 decimals coincide. The cubic root of 140256644 is about 519.5665075604.

The spelling of 140256644 in words is "one hundred forty million, two hundred fifty-six thousand, six hundred forty-four".