40538689 has 3 divisors (see below), whose sum is σ = 40545057. Its totient is φ = 40532322.

The previous prime is 40538683. The next prime is 40538737. The reversal of 40538689 is 98683504.

The square root of 40538689 is 6367.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 40538689 - 2³ = 40538681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40538681) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3184 + ... + 9550.

It is an arithmetic number, because the mean of its divisors is an integer number (13515019).

Almost surely, 2^40538689 is an apocalyptic number.

40538689 is the 6367-th square number.

40538689 is the 3184-th centered octagonal number.

It is an amenable number.

40538689 is a deficient number, since it is larger than the sum of its proper divisors (6368).

40538689 is an frugal number, since it uses more digits than its factorization.

40538689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12734 (or 6367 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The cubic root of 40538689 is about 343.5235906779.

The spelling of 40538689 in words is "forty million, five hundred thirty-eight thousand, six hundred eighty-nine".