40402223 has 4 divisors (see below), whose sum is σ = 40659720. Its totient is φ = 40144728.

The previous prime is 40402177. The next prime is 40402253. The reversal of 40402223 is 32220404.

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

It is a cyclic number.

It is not a de Polignac number, because 40402223 - 2²⁰ = 39353647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128513 + ... + 128826.

It is an arithmetic number, because the mean of its divisors is an integer number (10164930).

Almost surely, 2^40402223 is an apocalyptic number.

40402223 is a deficient number, since it is larger than the sum of its proper divisors (257497).

40402223 is a wasteful number, since it uses less digits than its factorization.

40402223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257496.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 40402223 is about 6356.2743018218. The cubic root of 40402223 is about 343.1376877823.

Adding to 40402223 its reverse (32220404), we get a palindrome (72622627).

The spelling of 40402223 in words is "forty million, four hundred two thousand, two hundred twenty-three".