40538879 has 4 divisors (see below), whose sum is σ = 40566600. Its totient is φ = 40511160.

The previous prime is 40538833. The next prime is 40538881. The reversal of 40538879 is 97883504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40538879 - 2⁸ = 40538623 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40538899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11537 + ... + 14634.

It is an arithmetic number, because the mean of its divisors is an integer number (10141650).

Almost surely, 2^40538879 is an apocalyptic number.

40538879 is a deficient number, since it is larger than the sum of its proper divisors (27721).

40538879 is a wasteful number, since it uses less digits than its factorization.

40538879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27720.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 40538879 is about 6367.0149206673. The cubic root of 40538879 is about 343.5241273618.

The spelling of 40538879 in words is "forty million, five hundred thirty-eight thousand, eight hundred seventy-nine".