40172589 has 12 divisors (see below), whose sum is σ = 58082076. Its totient is φ = 26756352.

The previous prime is 40172551. The next prime is 40172599. The reversal of 40172589 is 98527104.

40172589 is a `hidden beast` number, since 4 + 0 + 1 + 72 + 589 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37822500 + 2350089 = 6150^2 + 1533^2 .

It is not a de Polignac number, because 40172589 - 2²⁰ = 39124013 is a prime.

It is a super-2 number, since 2×40172589² = 3227673813925842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40172549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17047 + ... + 19259.

It is an arithmetic number, because the mean of its divisors is an integer number (4840173).

Almost surely, 2^40172589 is an apocalyptic number.

It is an amenable number.

40172589 is a deficient number, since it is larger than the sum of its proper divisors (17909487).

40172589 is a wasteful number, since it uses less digits than its factorization.

40172589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4236 (or 4233 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 40172589 is about 6338.1849925669. The cubic root of 40172589 is about 342.4863553269.

The spelling of 40172589 in words is "forty million, one hundred seventy-two thousand, five hundred eighty-nine".