49987881 has 8 divisors (see below), whose sum is σ = 74056160. Its totient is φ = 33325236.

The previous prime is 49987877. The next prime is 49987891. The reversal of 49987881 is 18878994.

49987881 is a `hidden beast` number, since 499 + 8 + 78 + 81 = 666.

49987881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 49987881 - 2² = 49987877 is a prime.

It is a super-2 number, since 2×49987881² = 4997576493740322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49987891) 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 7 ways as a sum of consecutive naturals, for example, 925675 + ... + 925728.

It is an arithmetic number, because the mean of its divisors is an integer number (9257020).

Almost surely, 2^49987881 is an apocalyptic number.

It is an amenable number.

49987881 is a deficient number, since it is larger than the sum of its proper divisors (24068279).

49987881 is a wasteful number, since it uses less digits than its factorization.

49987881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851412 (or 1851406 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 49987881 is about 7070.2108172246. The cubic root of 49987881 is about 368.3733829405.

The spelling of 49987881 in words is "forty-nine million, nine hundred eighty-seven thousand, eight hundred eighty-one".