40745556 has 18 divisors (see below), whose sum is σ = 102995802. Its totient is φ = 13581840.

The previous prime is 40745539. The next prime is 40745561. The reversal of 40745556 is 65554704.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23853456 + 16892100 = 4884^2 + 4110^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1131821 = 40745556 / (4 + 0 + 7 + 4 + 5 + 5 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 40745556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 565875 + ... + 565946.

It is an arithmetic number, because the mean of its divisors is an integer number (5721989).

Almost surely, 2^40745556 is an apocalyptic number.

It is an amenable number.

40745556 is an abundant number, since it is smaller than the sum of its proper divisors (62250246).

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

40745556 is a wasteful number, since it uses less digits than its factorization.

40745556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131831 (or 1131826 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 40745556 is about 6383.2245769673. The cubic root of 40745556 is about 344.1069277294.

The spelling of 40745556 in words is "forty million, seven hundred forty-five thousand, five hundred fifty-six".