40223839 has 4 divisors (see below), whose sum is σ = 40373640. Its totient is φ = 40074040.

The previous prime is 40223837. The next prime is 40223851. The reversal of 40223839 is 93832204.

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 40223839 - 2¹ = 40223837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40223839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40223831) 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, 74497 + ... + 75034.

It is an arithmetic number, because the mean of its divisors is an integer number (10093410).

Almost surely, 2^40223839 is an apocalyptic number.

40223839 is a deficient number, since it is larger than the sum of its proper divisors (149801).

40223839 is a wasteful number, since it uses less digits than its factorization.

40223839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149800.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 40223839 is about 6342.2266594627. The cubic root of 40223839 is about 342.6319352467.

The spelling of 40223839 in words is "forty million, two hundred twenty-three thousand, eight hundred thirty-nine".