49688781 has 16 divisors (see below), whose sum is σ = 69987840. Its totient is φ = 31270320.

The previous prime is 49688707. The next prime is 49688801. The reversal of 49688781 is 18788694.

It is not a de Polignac number, because 49688781 - 2²¹ = 47591629 is a prime.

It is a super-2 number, since 2×49688781² = 4937949914531922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49688701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16326 + ... + 19128.

It is an arithmetic number, because the mean of its divisors is an integer number (4374240).

Almost surely, 2^49688781 is an apocalyptic number.

It is an amenable number.

49688781 is a deficient number, since it is larger than the sum of its proper divisors (20299059).

49688781 is a wasteful number, since it uses less digits than its factorization.

49688781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3136.

The product of its digits is 774144, while the sum is 51.

The square root of 49688781 is about 7049.0269541264. The cubic root of 49688781 is about 367.6371980680.

The spelling of 49688781 in words is "forty-nine million, six hundred eighty-eight thousand, seven hundred eighty-one".