4040538 has 16 divisors (see below), whose sum is σ = 8269536. Its totient is φ = 1315440.

The previous prime is 4040527. The next prime is 4040549. The reversal of 4040538 is 8350404.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4040527) and next prime (4040549).

It is a Curzon 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, 7573 + ... + 8088.

It is an arithmetic number, because the mean of its divisors is an integer number (516846).

Almost surely, 2^4040538 is an apocalyptic number.

4040538 is an abundant number, since it is smaller than the sum of its proper divisors (4228998).

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

4040538 is a wasteful number, since it uses less digits than its factorization.

4040538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15709.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 4040538 is about 2010.1089522710. The cubic root of 4040538 is about 159.2745543163.

The spelling of 4040538 in words is "four million, forty thousand, five hundred thirty-eight".