40890256 has 30 divisors (see below), whose sum is σ = 87086006. Its totient is φ = 18585600.

The previous prime is 40890233. The next prime is 40890257. The reversal of 40890256 is 65209804.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37945600 + 2944656 = 6160^2 + 1716^2 .

It is not an unprimeable number, because it can be changed into a prime (40890257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8625 + ... + 12496.

Almost surely, 2^40890256 is an apocalyptic number.

It is an amenable number.

40890256 is an abundant number, since it is smaller than the sum of its proper divisors (46195750).

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

40890256 is a wasteful number, since it uses less digits than its factorization.

40890256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21151 (or 21134 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 40890256 is about 6394.5489285797. The cubic root of 40890256 is about 344.5137896532.

The spelling of 40890256 in words is "forty million, eight hundred ninety thousand, two hundred fifty-six".