40018932 has 18 divisors (see below), whose sum is σ = 101159058. Its totient is φ = 13339632.

The previous prime is 40018931. The next prime is 40018943. The reversal of 40018932 is 23981004.

40018932 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 39614436 + 404496 = 6294^2 + 636^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 40018896 and 40018905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40018931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555783 + ... + 555854.

Almost surely, 2^40018932 is an apocalyptic number.

It is an amenable number.

40018932 is an abundant number, since it is smaller than the sum of its proper divisors (61140126).

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

40018932 is a wasteful number, since it uses less digits than its factorization.

40018932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111647 (or 1111642 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 40018932 is about 6326.0518492975. The cubic root of 40018932 is about 342.0491362662.

Adding to 40018932 its reverse (23981004), we get a palindrome (63999936).

The spelling of 40018932 in words is "forty million, eighteen thousand, nine hundred thirty-two".