40040960 has 40 divisors (see below), whose sum is σ = 96010596. Its totient is φ = 16015360.

The previous prime is 40040929. The next prime is 40040963. The reversal of 40040960 is 6904004.

It can be written as a sum of positive squares in 2 ways, for example, as 36772096 + 3268864 = 6064^2 + 1808^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040963) 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, 5261 + ... + 10380.

Almost surely, 2^40040960 is an apocalyptic number.

40040960 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40040960 is an abundant number, since it is smaller than the sum of its proper divisors (55969636).

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

40040960 is an equidigital number, since it uses as much as digits as its factorization.

40040960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15664 (or 15648 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40040960 is about 6327.7926641128. The cubic root of 40040960 is about 342.1118838706. Note that the first 3 decimals are identical.

Adding to 40040960 its reverse (6904004), we get a palindrome (46944964).

The spelling of 40040960 in words is "forty million, forty thousand, nine hundred sixty".