122728047 has 16 divisors (see below), whose sum is σ = 180525408. Its totient is φ = 73681920.

The previous prime is 122728027. The next prime is 122728051. The reversal of 122728047 is 740827221.

It is not a de Polignac number, because 122728047 - 2¹⁹ = 122203759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122727999 and 122728017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122728007) 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, 36778 + ... + 39975.

It is an arithmetic number, because the mean of its divisors is an integer number (11282838).

Almost surely, 2^122728047 is an apocalyptic number.

122728047 is a deficient number, since it is larger than the sum of its proper divisors (57797361).

122728047 is a wasteful number, since it uses less digits than its factorization.

122728047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76810.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 122728047 is about 11078.2691337591. The cubic root of 122728047 is about 496.9521887756.

The spelling of 122728047 in words is "one hundred twenty-two million, seven hundred twenty-eight thousand, forty-seven".