40556550 has 48 divisors (see below), whose sum is σ = 101614032. Its totient is φ = 10704000.

The previous prime is 40556533. The next prime is 40556557. The reversal of 40556550 is 5565504.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40556557) 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 23 ways as a sum of consecutive naturals, for example, 13812 + ... + 16488.

It is an arithmetic number, because the mean of its divisors is an integer number (2116959).

Almost surely, 2^40556550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40556550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50807016).

40556550 is an abundant number, since it is smaller than the sum of its proper divisors (61057482).

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

40556550 is a wasteful number, since it uses less digits than its factorization.

40556550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793 (or 2788 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 40556550 is about 6368.4024684374. The cubic root of 40556550 is about 343.5740344566.

The spelling of 40556550 in words is "forty million, five hundred fifty-six thousand, five hundred fifty".