50128749 has 12 divisors (see below), whose sum is σ = 78990912. Its totient is φ = 30381000.

The previous prime is 50128709. The next prime is 50128759. The reversal of 50128749 is 94782105.

It is not a de Polignac number, because 50128749 - 2⁹ = 50128237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50128709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 253077 + ... + 253274.

It is an arithmetic number, because the mean of its divisors is an integer number (6582576).

Almost surely, 2^50128749 is an apocalyptic number.

It is an amenable number.

50128749 is a deficient number, since it is larger than the sum of its proper divisors (28862163).

50128749 is a wasteful number, since it uses less digits than its factorization.

50128749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506368 (or 506365 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 50128749 is about 7080.1658878871. The cubic root of 50128749 is about 368.7190890876.

The spelling of 50128749 in words is "fifty million, one hundred twenty-eight thousand, seven hundred forty-nine".