40420023 has 16 divisors (see below), whose sum is σ = 61701120. Its totient is φ = 23056416.

The previous prime is 40420013. The next prime is 40420057. The reversal of 40420023 is 32002404.

It is a happy number.

40420023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40420023 - 2⁴ = 40420007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40419984 and 40420011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40420013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13761 + ... + 16437.

It is an arithmetic number, because the mean of its divisors is an integer number (3856320).

Almost surely, 2^40420023 is an apocalyptic number.

40420023 is a deficient number, since it is larger than the sum of its proper divisors (21281097).

40420023 is a wasteful number, since it uses less digits than its factorization.

40420023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 40420023 is about 6357.6743389387. The cubic root of 40420023 is about 343.1880724198.

Adding to 40420023 its reverse (32002404), we get a palindrome (72422427).

The spelling of 40420023 in words is "forty million, four hundred twenty thousand, twenty-three".