28786122 has 12 divisors (see below), whose sum is σ = 62369970. Its totient is φ = 9595368.

The previous prime is 28786063. The next prime is 28786123. The reversal of 28786122 is 22168782.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23126481 + 5659641 = 4809^2 + 2379^2 .

It is not an unprimeable number, because it can be changed into a prime (28786123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 799597 + ... + 799632.

Almost surely, 2^28786122 is an apocalyptic number.

28786122 is an abundant number, since it is smaller than the sum of its proper divisors (33583848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28786122 is a wasteful number, since it uses less digits than its factorization.

28786122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599237 (or 1599234 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 28786122 is about 5365.2699838871. The cubic root of 28786122 is about 306.4745296658.

The spelling of 28786122 in words is "twenty-eight million, seven hundred eighty-six thousand, one hundred twenty-two".