40339423 has 4 divisors (see below), whose sum is σ = 40596520. Its totient is φ = 40082328.

The previous prime is 40339393. The next prime is 40339441. The reversal of 40339423 is 32493304.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40339423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40339391 and 40339400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40334423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128313 + ... + 128626.

It is an arithmetic number, because the mean of its divisors is an integer number (10149130).

Almost surely, 2^40339423 is an apocalyptic number.

40339423 is a deficient number, since it is larger than the sum of its proper divisors (257097).

40339423 is a wasteful number, since it uses less digits than its factorization.

40339423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257096.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 40339423 is about 6351.3323799027. The cubic root of 40339423 is about 342.9598079537.

It can be divided in two parts, 4033 and 9423, that added together give a square (13456 = 116²).

The spelling of 40339423 in words is "forty million, three hundred thirty-nine thousand, four hundred twenty-three".