39860881 has 4 divisors (see below), whose sum is σ = 39883264. Its totient is φ = 39838500.

The previous prime is 39860857. The next prime is 39860923. The reversal of 39860881 is 18806893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39860881 - 2⁹ = 39860369 is a prime.

It is a super-2 number, since 2×39860881² = 3177779668192322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39860831) 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, 8265 + ... + 12166.

It is an arithmetic number, because the mean of its divisors is an integer number (9970816).

Almost surely, 2^39860881 is an apocalyptic number.

It is an amenable number.

39860881 is a deficient number, since it is larger than the sum of its proper divisors (22383).

39860881 is a wasteful number, since it uses less digits than its factorization.

39860881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22382.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 39860881 is about 6313.5474180527. The cubic root of 39860881 is about 341.5982452189.

The spelling of 39860881 in words is "thirty-nine million, eight hundred sixty thousand, eight hundred eighty-one".