40128873 has 8 divisors (see below), whose sum is σ = 54810336. Its totient is φ = 26100000.

The previous prime is 40128871. The next prime is 40128877. The reversal of 40128873 is 37882104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40128873 - 2¹ = 40128871 is a prime.

It is a super-2 number, since 2×40128873² = 3220652896500258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40128871) by changing a digit.

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, 163003 + ... + 163248.

It is an arithmetic number, because the mean of its divisors is an integer number (6851292).

Almost surely, 2^40128873 is an apocalyptic number.

It is an amenable number.

40128873 is a deficient number, since it is larger than the sum of its proper divisors (14681463).

40128873 is a wasteful number, since it uses less digits than its factorization.

40128873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326295.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 40128873 is about 6334.7354325181. The cubic root of 40128873 is about 342.3620784831.

The spelling of 40128873 in words is "forty million, one hundred twenty-eight thousand, eight hundred seventy-three".