40004623 has 4 divisors (see below), whose sum is σ = 40112248. Its totient is φ = 39897000.

The previous prime is 40004611. The next prime is 40004651. The reversal of 40004623 is 32640004.

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 40004623 - 2¹³ = 39996431 is a prime.

It is a super-2 number, since 2×40004623² = 3200739722744258, which contains 22 as substring.

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 40004623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40004603) 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, 53253 + ... + 53998.

It is an arithmetic number, because the mean of its divisors is an integer number (10028062).

Almost surely, 2^40004623 is an apocalyptic number.

40004623 is a deficient number, since it is larger than the sum of its proper divisors (107625).

40004623 is a wasteful number, since it uses less digits than its factorization.

40004623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107624.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40004623 is about 6324.9207900178. The cubic root of 40004623 is about 342.0083641925.

Adding to 40004623 its reverse (32640004), we get a palindrome (72644627).

The spelling of 40004623 in words is "forty million, four thousand, six hundred twenty-three".