40508538 has 32 divisors (see below), whose sum is σ = 92958720. Its totient is φ = 11527920.

The previous prime is 40508527. The next prime is 40508539. The reversal of 40508538 is 83580504.

It is a happy number.

40508538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 40508499 and 40508508.

It is not an unprimeable number, because it can be changed into a prime (40508539) 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, 9603 + ... + 13161.

It is an arithmetic number, because the mean of its divisors is an integer number (2904960).

Almost surely, 2^40508538 is an apocalyptic number.

40508538 is an abundant number, since it is smaller than the sum of its proper divisors (52450182).

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

40508538 is a wasteful number, since it uses less digits than its factorization.

40508538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3842.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 40508538 is about 6364.6318039616. The cubic root of 40508538 is about 343.4384033425.

The spelling of 40508538 in words is "forty million, five hundred eight thousand, five hundred thirty-eight".