40169984 has 40 divisors (see below), whose sum is σ = 81529008. Its totient is φ = 19768320.

The previous prime is 40169981. The next prime is 40169989. The reversal of 40169984 is 48996104.

It is a super-2 number, since 2×40169984² = 3227255229120512, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (40169981) 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, 33719 + ... + 34889.

Almost surely, 2^40169984 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 40169984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40764504).

40169984 is an abundant number, since it is smaller than the sum of its proper divisors (41359024).

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

40169984 is an equidigital number, since it uses as much as digits as its factorization.

40169984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 1240 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 40169984 is about 6337.9794887645. The cubic root of 40169984 is about 342.4789523003.

The spelling of 40169984 in words is "forty million, one hundred sixty-nine thousand, nine hundred eighty-four".