28783122 has 16 divisors (see below), whose sum is σ = 57622080. Its totient is φ = 9585072.

The previous prime is 28783121. The next prime is 28783123. The reversal of 28783122 is 22138782.

It is an interprime number because it is at equal distance from previous prime (28783121) and next prime (28783123).

It is a super-2 number, since 2×28783122² = 1656936224133768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28783121) 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, 7704 + ... + 10812.

It is an arithmetic number, because the mean of its divisors is an integer number (3601380).

Almost surely, 2^28783122 is an apocalyptic number.

28783122 is an abundant number, since it is smaller than the sum of its proper divisors (28838958).

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

28783122 is a wasteful number, since it uses less digits than its factorization.

28783122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4657.

The product of its digits is 10752, while the sum is 33.

The square root of 28783122 is about 5364.9904007370. The cubic root of 28783122 is about 306.4638826889.

The spelling of 28783122 in words is "twenty-eight million, seven hundred eighty-three thousand, one hundred twenty-two".