40135172 has 48 divisors (see below), whose sum is σ = 88058880. Its totient is φ = 15549600.

The previous prime is 40135171. The next prime is 40135177. The reversal of 40135172 is 27153104.

It is a super-2 number, since 2×40135172² = 3221664062939168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40135171) 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, 95579 + ... + 95997.

It is an arithmetic number, because the mean of its divisors is an integer number (1834560).

Almost surely, 2^40135172 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 40135172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44029440).

40135172 is an abundant number, since it is smaller than the sum of its proper divisors (47923708).

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

40135172 is a wasteful number, since it uses less digits than its factorization.

40135172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 40135172 is about 6335.2325924152. The cubic root of 40135172 is about 342.3799909880.

Adding to 40135172 its reverse (27153104), we get a palindrome (67288276).

The spelling of 40135172 in words is "forty million, one hundred thirty-five thousand, one hundred seventy-two".