40423020 has 96 divisors (see below), whose sum is σ = 125314560. Its totient is φ = 9653760.

The previous prime is 40423001. The next prime is 40423057. The reversal of 40423020 is 2032404.

It is a happy number.

40423020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 47761 + ... + 48599.

It is an arithmetic number, because the mean of its divisors is an integer number (1305360).

Almost surely, 2^40423020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40423020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62657280).

40423020 is an abundant number, since it is smaller than the sum of its proper divisors (84891540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40423020 is a wasteful number, since it uses less digits than its factorization.

40423020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 933 counting only the distinct ones).

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

The square root of 40423020 is about 6357.9100339656. The cubic root of 40423020 is about 343.1965542658.

Adding to 40423020 its reverse (2032404), we get a palindrome (42455424).

The spelling of 40423020 in words is "forty million, four hundred twenty-three thousand, twenty".