40080080 has 20 divisors (see below), whose sum is σ = 93186372. Its totient is φ = 16032000.

The previous prime is 40080077. The next prime is 40080091. The reversal of 40080080 is 8008004.

It can be written as a sum of positive squares in 2 ways, for example, as 4032064 + 36048016 = 2008^2 + 6004^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250421 + ... + 250580.

Almost surely, 2^40080080 is an apocalyptic number.

40080080 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40080080 is an abundant number, since it is smaller than the sum of its proper divisors (53106292).

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

40080080 is a wasteful number, since it uses less digits than its factorization.

40080080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501014 (or 501008 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 40080080 is about 6330.8830347748. The cubic root of 40080080 is about 342.2232619922.

Adding to 40080080 its reverse (8008004), we get a palindrome (48088084).

The spelling of 40080080 in words is "forty million, eighty thousand, eighty".