140402256 has 40 divisors (see below), whose sum is σ = 363842784. Its totient is φ = 46654080.

The previous prime is 140402239. The next prime is 140402257. The reversal of 140402256 is 652204041.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140402257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11470 + ... + 20306.

Almost surely, 2^140402256 is an apocalyptic number.

140402256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

140402256 is an abundant number, since it is smaller than the sum of its proper divisors (223440528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140402256 is a wasteful number, since it uses less digits than its factorization.

140402256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9179 (or 9173 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 140402256 is about 11849.1457919970. The cubic root of 140402256 is about 519.7462470008.

Adding to 140402256 its reverse (652204041), we get a palindrome (792606297).

The spelling of 140402256 in words is "one hundred forty million, four hundred two thousand, two hundred fifty-six".