40033656 has 128 divisors (see below), whose sum is σ = 122472000. Its totient is φ = 12040704.

The previous prime is 40033649. The next prime is 40033723. The reversal of 40033656 is 65633004.

40033656 is a `hidden beast` number, since 4 + 0 + 0 + 3 + 3 + 656 = 666.

It is a super-2 number, since 2×40033656² = 3205387225452672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148690 + ... + 148958.

Almost surely, 2^40033656 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 40033656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61236000).

40033656 is an abundant number, since it is smaller than the sum of its proper divisors (82438344).

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

40033656 is a wasteful number, since it uses less digits than its factorization.

40033656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 40033656 is about 6327.2155013086. The cubic root of 40033656 is about 342.0910806968.

The spelling of 40033656 in words is "forty million, thirty-three thousand, six hundred fifty-six".