40128299 has 8 divisors (see below), whose sum is σ = 41195952. Its totient is φ = 39064960.

The previous prime is 40128293. The next prime is 40128311. The reversal of 40128299 is 99282104.

40128299 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40128299 is a prime.

It is a super-2 number, since 2×40128299² = 3220560761266802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40128293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27287 + ... + 28719.

It is an arithmetic number, because the mean of its divisors is an integer number (5149494).

Almost surely, 2^40128299 is an apocalyptic number.

40128299 is a deficient number, since it is larger than the sum of its proper divisors (1067653).

40128299 is a wasteful number, since it uses less digits than its factorization.

40128299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 40128299 is about 6334.6901265966. The cubic root of 40128299 is about 342.3604461026.

The spelling of 40128299 in words is "forty million, one hundred twenty-eight thousand, two hundred ninety-nine".