46639881 has 20 divisors (see below), whose sum is σ = 70374084. Its totient is φ = 30780000.

The previous prime is 46639877. The next prime is 46639897. The reversal of 46639881 is 18893664.

46639881 is a `hidden beast` number, since 4 + 6 + 639 + 8 + 8 + 1 = 666.

46639881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42575625 + 4064256 = 6525^2 + 2016^2 .

It is not a de Polignac number, because 46639881 - 2² = 46639877 is a prime.

It is a super-2 number, since 2×46639881² = 4350556999388322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (46639811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5331 + ... + 11031.

Almost surely, 2^46639881 is an apocalyptic number.

It is an amenable number.

46639881 is a deficient number, since it is larger than the sum of its proper divisors (23734203).

46639881 is a wasteful number, since it uses less digits than its factorization.

46639881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5814 (or 5805 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 46639881 is about 6829.3397191822. The cubic root of 46639881 is about 359.9585368913.

The spelling of 46639881 in words is "forty-six million, six hundred thirty-nine thousand, eight hundred eighty-one".