40069888 has 36 divisors (see below), whose sum is σ = 80496808. Its totient is φ = 19906560.

The previous prime is 40069871. The next prime is 40069889. The reversal of 40069888 is 88896004.

It is not an unprimeable number, because it can be changed into a prime (40069889) 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, 49003 + ... + 49813.

Almost surely, 2^40069888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40069888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40248404).

40069888 is an abundant number, since it is smaller than the sum of its proper divisors (40426920).

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

40069888 is an equidigital number, since it uses as much as digits as its factorization.

40069888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 40069888 is about 6330.0780405932. The cubic root of 40069888 is about 342.1942514448.

The spelling of 40069888 in words is "forty million, sixty-nine thousand, eight hundred eighty-eight".