40420223 has 4 divisors (see below), whose sum is σ = 42177648. Its totient is φ = 38662800.

The previous prime is 40420157. The next prime is 40420231. The reversal of 40420223 is 32202404.

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 40420223 - 2¹⁰ = 40419199 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 (40420123) 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, 878678 + ... + 878723.

It is an arithmetic number, because the mean of its divisors is an integer number (10544412).

Almost surely, 2^40420223 is an apocalyptic number.

40420223 is a deficient number, since it is larger than the sum of its proper divisors (1757425).

40420223 is a wasteful number, since it uses less digits than its factorization.

40420223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757424.

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

The square root of 40420223 is about 6357.6900679413. The cubic root of 40420223 is about 343.1886384553.

Adding to 40420223 its reverse (32202404), we get a palindrome (72622627).

The spelling of 40420223 in words is "forty million, four hundred twenty thousand, two hundred twenty-three".