40128670 has 32 divisors (see below), whose sum is σ = 77083488. Its totient is φ = 14988288.

The previous prime is 40128659. The next prime is 40128679. The reversal of 40128670 is 7682104.

It is a super-2 number, since 2×40128670² = 3220620311937800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40128679) 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 15 ways as a sum of consecutive naturals, for example, 22429 + ... + 24151.

It is an arithmetic number, because the mean of its divisors is an integer number (2408859).

Almost surely, 2^40128670 is an apocalyptic number.

40128670 is a deficient number, since it is larger than the sum of its proper divisors (36954818).

40128670 is a wasteful number, since it uses less digits than its factorization.

40128670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 40128670 is about 6334.7194097292. The cubic root of 40128670 is about 342.3615011795.

The spelling of 40128670 in words is "forty million, one hundred twenty-eight thousand, six hundred seventy".