40128746 has 12 divisors (see below), whose sum is σ = 70020738. Its totient is φ = 17197992.

The previous prime is 40128733. The next prime is 40128769. The reversal of 40128746 is 64782104.

It can be written as a sum of positive squares in only one way, i.e., 22193521 + 17935225 = 4711^2 + 4235^2 .

It is a super-2 number, since 2×40128746² = 3220632511065032, 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 5 ways as a sum of consecutive naturals, for example, 204641 + ... + 204836.

Almost surely, 2^40128746 is an apocalyptic number.

40128746 is a deficient number, since it is larger than the sum of its proper divisors (29891992).

40128746 is a wasteful number, since it uses less digits than its factorization.

40128746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409493 (or 409486 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 40128746 is about 6334.7254084135. The cubic root of 40128746 is about 342.3617173131.

The spelling of 40128746 in words is "forty million, one hundred twenty-eight thousand, seven hundred forty-six".