40180544 has 28 divisors (see below), whose sum is σ = 82486500. Its totient is φ = 19396608.

The previous prime is 40180541. The next prime is 40180559. The reversal of 40180544 is 44508104.

It can be written as a sum of positive squares in 2 ways, for example, as 17977600 + 22202944 = 4240^2 + 4712^2 .

It is a super-2 number, since 2×40180544² = 3228952232271872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40180541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8969 + ... + 12680.

Almost surely, 2^40180544 is an apocalyptic number.

It is an amenable number.

40180544 is an abundant number, since it is smaller than the sum of its proper divisors (42305956).

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

40180544 is a wasteful number, since it uses less digits than its factorization.

40180544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21690 (or 21680 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 40180544 is about 6338.8125070868. The cubic root of 40180544 is about 342.5089602856.

Adding to 40180544 its reverse (44508104), we get a palindrome (84688648).

The spelling of 40180544 in words is "forty million, one hundred eighty thousand, five hundred forty-four".