40228993 has 8 divisors (see below), whose sum is σ = 46218240. Its totient is φ = 34300320.

The previous prime is 40228949. The next prime is 40228999. The reversal of 40228993 is 39982204.

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

It is a cyclic number.

It is not a de Polignac number, because 40228993 - 2²⁵ = 6674561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40228999) 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, 13708 + ... + 16381.

It is an arithmetic number, because the mean of its divisors is an integer number (5777280).

Almost surely, 2^40228993 is an apocalyptic number.

It is an amenable number.

40228993 is a deficient number, since it is larger than the sum of its proper divisors (5989247).

40228993 is a wasteful number, since it uses less digits than its factorization.

40228993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30287.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 40228993 is about 6342.6329706203. The cubic root of 40228993 is about 342.6465687710.

The spelling of 40228993 in words is "forty million, two hundred twenty-eight thousand, nine hundred ninety-three".