40256172 has 72 divisors (see below), whose sum is σ = 112956480. Its totient is φ = 11985120.

The previous prime is 40256159. The next prime is 40256201. The reversal of 40256172 is 27165204.

40256172 is a `hidden beast` number, since 40 + 2 + 5 + 617 + 2 = 666.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 22503 + ... + 24225.

It is an arithmetic number, because the mean of its divisors is an integer number (1568840).

Almost surely, 2^40256172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40256172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56478240).

40256172 is an abundant number, since it is smaller than the sum of its proper divisors (72700308).

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

40256172 is a wasteful number, since it uses less digits than its factorization.

40256172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803 (or 1798 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 40256172 is about 6344.7751733217. The cubic root of 40256172 is about 342.7237162371.

The spelling of 40256172 in words is "forty million, two hundred fifty-six thousand, one hundred seventy-two".