49788381 has 4 divisors (see below), whose sum is σ = 66384512. Its totient is φ = 33192252.

The previous prime is 49788377. The next prime is 49788433. The reversal of 49788381 is 18388794.

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 not a de Polignac number, because 49788381 - 2² = 49788377 is a prime.

It is a super-2 number, since 2×49788381² = 4957765765202322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49788381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49788481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8298061 + ... + 8298066.

It is an arithmetic number, because the mean of its divisors is an integer number (16596128).

Almost surely, 2^49788381 is an apocalyptic number.

It is an amenable number.

49788381 is a deficient number, since it is larger than the sum of its proper divisors (16596131).

49788381 is a wasteful number, since it uses less digits than its factorization.

49788381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16596130.

The product of its digits is 387072, while the sum is 48.

The square root of 49788381 is about 7056.0882222376. The cubic root of 49788381 is about 367.8826741805.

The spelling of 49788381 in words is "forty-nine million, seven hundred eighty-eight thousand, three hundred eighty-one".