40521656 has 16 divisors (see below), whose sum is σ = 86832240. Its totient is φ = 17366400.

The previous prime is 40521647. The next prime is 40521673. The reversal of 40521656 is 65612504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361745 + ... + 361856.

It is an arithmetic number, because the mean of its divisors is an integer number (5427015).

Almost surely, 2^40521656 is an apocalyptic number.

It is an amenable number.

40521656 is an abundant number, since it is smaller than the sum of its proper divisors (46310584).

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

40521656 is a wasteful number, since it uses less digits than its factorization.

40521656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723614 (or 723610 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 40521656 is about 6365.6622593411. The cubic root of 40521656 is about 343.4754715670.

The spelling of 40521656 in words is "forty million, five hundred twenty-one thousand, six hundred fifty-six".