40023522 has 96 divisors (see below), whose sum is σ = 109983744. Its totient is φ = 10216800.

The previous prime is 40023499. The next prime is 40023551. The reversal of 40023522 is 22532004.

40023522 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 (18).

It is a junction number, because it is equal to n+sod(n) for n = 40023495 and 40023504.

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 47 ways as a sum of consecutive naturals, for example, 92647 + ... + 93077.

It is an arithmetic number, because the mean of its divisors is an integer number (1145664).

Almost surely, 2^40023522 is an apocalyptic number.

40023522 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 40023522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54991872).

40023522 is an abundant number, since it is smaller than the sum of its proper divisors (69960222).

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

40023522 is a wasteful number, since it uses less digits than its factorization.

40023522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 40023522 is about 6326.4146244141. The cubic root of 40023522 is about 342.0622129563.

Adding to 40023522 its reverse (22532004), we get a palindrome (62555526).

The spelling of 40023522 in words is "forty million, twenty-three thousand, five hundred twenty-two".