40172544 has 88 divisors (see below), whose sum is σ = 119053520. Its totient is φ = 13381632.

The previous prime is 40172543. The next prime is 40172549. The reversal of 40172544 is 44527104.

40172544 is a `hidden beast` number, since 401 + 7 + 254 + 4 = 666.

It is a super-2 number, since 2×40172544² = 3227666582863872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40172543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26922 + ... + 28374.

Almost surely, 2^40172544 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 40172544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59526760).

40172544 is an abundant number, since it is smaller than the sum of its proper divisors (78880976).

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

40172544 is a wasteful number, since it uses less digits than its factorization.

40172544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 40172544 is about 6338.1814426537. The cubic root of 40172544 is about 342.4862274463.

Adding to 40172544 its reverse (44527104), we get a palindrome (84699648).

It can be divided in two parts, 4017 and 2544, that added together give a 8-th power (6561 = 3⁸).

The spelling of 40172544 in words is "forty million, one hundred seventy-two thousand, five hundred forty-four".