40821256 has 32 divisors (see below), whose sum is σ = 88050240. Its totient is φ = 17379648.

The previous prime is 40821247. The next prime is 40821257. The reversal of 40821256 is 65212804.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (40821257) 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 7 ways as a sum of consecutive naturals, for example, 6471 + ... + 11113.

It is an arithmetic number, because the mean of its divisors is an integer number (2751570).

Almost surely, 2^40821256 is an apocalyptic number.

It is an amenable number.

40821256 is an abundant number, since it is smaller than the sum of its proper divisors (47228984).

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

40821256 is a wasteful number, since it uses less digits than its factorization.

40821256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4813 (or 4809 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 40821256 is about 6389.1514303544. The cubic root of 40821256 is about 344.3198980243.

The spelling of 40821256 in words is "forty million, eight hundred twenty-one thousand, two hundred fifty-six".