40405760 has 36 divisors (see below), whose sum is σ = 96787488. Its totient is φ = 16161792.

The previous prime is 40405751. The next prime is 40405763. The reversal of 40405760 is 6750404.

It is not an unprimeable number, because it can be changed into a prime (40405763) 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, 14504 + ... + 17063.

Almost surely, 2^40405760 is an apocalyptic number.

40405760 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40405760 is an abundant number, since it is smaller than the sum of its proper divisors (56381728).

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

40405760 is an equidigital number, since it uses as much as digits as its factorization.

40405760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31588 (or 31574 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 40405760 is about 6356.5525247574. The cubic root of 40405760 is about 343.1477007840.

The spelling of 40405760 in words is "forty million, four hundred five thousand, seven hundred sixty".