40159632 has 80 divisors (see below), whose sum is σ = 108421632. Its totient is φ = 12794880.

The previous prime is 40159631. The next prime is 40159643. The reversal of 40159632 is 23695104.

It is a super-4 number, since 4×40159632⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 40159632.

It is not an unprimeable number, because it can be changed into a prime (40159631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203758 + ... + 203954.

Almost surely, 2^40159632 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 40159632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54210816).

40159632 is an abundant number, since it is smaller than the sum of its proper divisors (68262000).

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

40159632 is a wasteful number, since it uses less digits than its factorization.

40159632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 40159632 is about 6337.1627720929. The cubic root of 40159632 is about 342.4495302762.

The spelling of 40159632 in words is "forty million, one hundred fifty-nine thousand, six hundred thirty-two".