40267993 has 4 divisors (see below), whose sum is σ = 40666788. Its totient is φ = 39869200.

The previous prime is 40267987. The next prime is 40268021. The reversal of 40267993 is 39976204.

40267993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21501769 + 18766224 = 4637^2 + 4332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40267993 is a prime.

It is a super-2 number, since 2×40267993² = 3243022520496098, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40267093) 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 3 ways as a sum of consecutive naturals, for example, 199246 + ... + 199447.

It is an arithmetic number, because the mean of its divisors is an integer number (10166697).

Almost surely, 2^40267993 is an apocalyptic number.

It is an amenable number.

40267993 is a deficient number, since it is larger than the sum of its proper divisors (398795).

40267993 is a wasteful number, since it uses less digits than its factorization.

40267993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398794.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 40267993 is about 6345.7066588364. The cubic root of 40267993 is about 342.7572592555.

The spelling of 40267993 in words is "forty million, two hundred sixty-seven thousand, nine hundred ninety-three".