40084040 has 16 divisors (see below), whose sum is σ = 90189180. Its totient is φ = 16033600.

The previous prime is 40084039. The next prime is 40084049. The reversal of 40084040 is 4048004.

It can be written as a sum of positive squares in 2 ways, for example, as 36312676 + 3771364 = 6026^2 + 1942^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (40084049) 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, 501011 + ... + 501090.

Almost surely, 2^40084040 is an apocalyptic number.

40084040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40084040 is an abundant number, since it is smaller than the sum of its proper divisors (50105140).

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

40084040 is a wasteful number, since it uses less digits than its factorization.

40084040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002112 (or 1002108 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 40084040 is about 6331.1957796296. The cubic root of 40084040 is about 342.2345324245.

The spelling of 40084040 in words is "forty million, eighty-four thousand, forty".