40280080 has 20 divisors (see below), whose sum is σ = 93651372. Its totient is φ = 16112000.

The previous prime is 40280063. The next prime is 40280083. The reversal of 40280080 is 8008204.

It can be written as a sum of positive squares in 2 ways, for example, as 26708224 + 13571856 = 5168^2 + 3684^2 .

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

It is not an unprimeable number, because it can be changed into a prime (40280083) 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, 251671 + ... + 251830.

Almost surely, 2^40280080 is an apocalyptic number.

40280080 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40280080 is an abundant number, since it is smaller than the sum of its proper divisors (53371292).

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

40280080 is a wasteful number, since it uses less digits than its factorization.

40280080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503514 (or 503508 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 40280080 is about 6346.6589635808. The cubic root of 40280080 is about 342.7915502829.

Adding to 40280080 its reverse (8008204), we get a palindrome (48288284).

The spelling of 40280080 in words is "forty million, two hundred eighty thousand, eighty".