122728511 has 8 divisors (see below), whose sum is σ = 123504000. Its totient is φ = 121956120.

The previous prime is 122728481. The next prime is 122728513. The reversal of 122728511 is 115827221.

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 122728511 - 2⁶ = 122728447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122728513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197960 + ... + 198578.

It is an arithmetic number, because the mean of its divisors is an integer number (15438000).

Almost surely, 2^122728511 is an apocalyptic number.

122728511 is a deficient number, since it is larger than the sum of its proper divisors (775489).

122728511 is an equidigital number, since it uses as much as digits as its factorization.

122728511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549.

The product of its digits is 2240, while the sum is 29.

The square root of 122728511 is about 11078.2900756389. The cubic root of 122728511 is about 496.9528150533.

The spelling of 122728511 in words is "one hundred twenty-two million, seven hundred twenty-eight thousand, five hundred eleven".