10639881 has 12 divisors (see below), whose sum is σ = 17564352. Its totient is φ = 6079896.

The previous prime is 10639879. The next prime is 10639891. The reversal of 10639881 is 18893601.

10639881 is a `hidden beast` number, since 10 + 639 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 10639881 - 2¹ = 10639879 is a prime.

It is a super-2 number, since 2×10639881² = 226414135388322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10639891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84381 + ... + 84506.

It is an arithmetic number, because the mean of its divisors is an integer number (1463696).

Almost surely, 2^10639881 is an apocalyptic number.

It is an amenable number.

10639881 is a deficient number, since it is larger than the sum of its proper divisors (6924471).

10639881 is a wasteful number, since it uses less digits than its factorization.

10639881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168900 (or 168897 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 10639881 is about 3261.8830451137. The cubic root of 10639881 is about 219.9440698042.

The spelling of 10639881 in words is "ten million, six hundred thirty-nine thousand, eight hundred eighty-one".