40023534 has 16 divisors (see below), whose sum is σ = 80825472. Its totient is φ = 13211448.

The previous prime is 40023499. The next prime is 40023551. The reversal of 40023534 is 43532004.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40023534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31764 + ... + 32999.

It is an arithmetic number, because the mean of its divisors is an integer number (5051592).

Almost surely, 2^40023534 is an apocalyptic number.

40023534 is an abundant number, since it is smaller than the sum of its proper divisors (40801938).

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

40023534 is a wasteful number, since it uses less digits than its factorization.

40023534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64871.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 40023534 is about 6326.4155728185. The cubic root of 40023534 is about 342.0622471425.

Adding to 40023534 its reverse (43532004), we get a palindrome (83555538).

The spelling of 40023534 in words is "forty million, twenty-three thousand, five hundred thirty-four".