49128769 has 8 divisors (see below), whose sum is σ = 51575040. Its totient is φ = 46736400.

The previous prime is 49128763. The next prime is 49128797. The reversal of 49128769 is 96782194.

49128769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49128769 - 2⁷ = 49128641 is a prime.

It is a super-2 number, since 2×49128769² = 4827271886910722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49128763) 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, 11602 + ... + 15259.

It is an arithmetic number, because the mean of its divisors is an integer number (6446880).

Almost surely, 2^49128769 is an apocalyptic number.

It is an amenable number.

49128769 is a deficient number, since it is larger than the sum of its proper divisors (2446271).

49128769 is a wasteful number, since it uses less digits than its factorization.

49128769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26951.

The product of its digits is 217728, while the sum is 46.

The square root of 49128769 is about 7009.1917508369. The cubic root of 49128769 is about 366.2508383305.

The spelling of 49128769 in words is "forty-nine million, one hundred twenty-eight thousand, seven hundred sixty-nine".