122728887 has 12 divisors (see below), whose sum is σ = 177642504. Its totient is φ = 81649680.

The previous prime is 122728873. The next prime is 122728913. The reversal of 122728887 is 788827221.

It is not a de Polignac number, because 122728887 - 2¹⁶ = 122663351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122728807) 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, 9468 + ... + 18305.

It is an arithmetic number, because the mean of its divisors is an integer number (14803542).

Almost surely, 2^122728887 is an apocalyptic number.

122728887 is a deficient number, since it is larger than the sum of its proper divisors (54913617).

122728887 is a wasteful number, since it uses less digits than its factorization.

122728887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28270 (or 28267 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 122728887 is about 11078.3070457539. The cubic root of 122728887 is about 496.9533225531.

The spelling of 122728887 in words is "one hundred twenty-two million, seven hundred twenty-eight thousand, eight hundred eighty-seven".