40100256 has 72 divisors (see below), whose sum is σ = 130332384. Its totient is φ = 11456640.

The previous prime is 40100239. The next prime is 40100257. The reversal of 40100256 is 65200104.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (40100257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7930 + ... + 11961.

It is an arithmetic number, because the mean of its divisors is an integer number (1810172).

Almost surely, 2^40100256 is an apocalyptic number.

It is an amenable number.

40100256 is an abundant number, since it is smaller than the sum of its proper divisors (90232128).

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

40100256 is a wasteful number, since it uses less digits than its factorization.

40100256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19914 (or 19903 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 40100256 is about 6332.4762928889. The cubic root of 40100256 is about 342.2806765338.

The spelling of 40100256 in words is "forty million, one hundred thousand, two hundred fifty-six".