40172560 has 40 divisors (see below), whose sum is σ = 93665880. Its totient is φ = 16023552.

The previous prime is 40172551. The next prime is 40172599. The reversal of 40172560 is 6527104.

It can be written as a sum of positive squares in 4 ways, for example, as 633616 + 39538944 = 796^2 + 6288^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×40172560² = 3227669153907200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51856 + ... + 52624.

It is an arithmetic number, because the mean of its divisors is an integer number (2341647).

Almost surely, 2^40172560 is an apocalyptic number.

40172560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40172560 is an abundant number, since it is smaller than the sum of its proper divisors (53493320).

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

40172560 is a wasteful number, since it uses less digits than its factorization.

40172560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 1429 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 40172560 is about 6338.1827048453. The cubic root of 40172560 is about 342.4862729149.

Adding to 40172560 its reverse (6527104), we get a palindrome (46699664).

The spelling of 40172560 in words is "forty million, one hundred seventy-two thousand, five hundred sixty".