40204980 has 36 divisors (see below), whose sum is σ = 121955652. Its totient is φ = 10721280.

The previous prime is 40204939. The next prime is 40204981. The reversal of 40204980 is 8940204.

It can be written as a sum of positive squares in 2 ways, for example, as 8259876 + 31945104 = 2874^2 + 5652^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40204981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111501 + ... + 111860.

It is an arithmetic number, because the mean of its divisors is an integer number (3387657).

Almost surely, 2^40204980 is an apocalyptic number.

It is an amenable number.

40204980 is an abundant number, since it is smaller than the sum of its proper divisors (81750672).

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

40204980 is a wasteful number, since it uses less digits than its factorization.

40204980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223376 (or 223371 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 40204980 is about 6340.7397044824. The cubic root of 40204980 is about 342.5783790642.

The spelling of 40204980 in words is "forty million, two hundred four thousand, nine hundred eighty".