40213623 has 16 divisors (see below), whose sum is σ = 54996480. Its totient is φ = 26125056.

The previous prime is 40213597. The next prime is 40213627. The reversal of 40213623 is 32631204.

It is a happy number.

It is not a de Polignac number, because 40213623 - 2⁶ = 40213559 is a prime.

It is a super-2 number, since 2×40213623² = 3234270949572258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40213623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40213627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42823 + ... + 43751.

It is an arithmetic number, because the mean of its divisors is an integer number (3437280).

Almost surely, 2^40213623 is an apocalyptic number.

40213623 is a deficient number, since it is larger than the sum of its proper divisors (14782857).

40213623 is a wasteful number, since it uses less digits than its factorization.

40213623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 40213623 is about 6341.4212129459. The cubic root of 40213623 is about 342.6029257148.

Adding to 40213623 its reverse (32631204), we get a palindrome (72844827).

The spelling of 40213623 in words is "forty million, two hundred thirteen thousand, six hundred twenty-three".