28422810 has 96 divisors (see below), whose sum is σ = 84324240. Its totient is φ = 6580224.

The previous prime is 28422763. The next prime is 28422811. The reversal of 28422810 is 1822482.

It can be written as a sum of positive squares in 8 ways, for example, as 4422609 + 24000201 = 2103^2 + 4899^2 .

It is a super-2 number, since 2×28422810² = 1615712256592200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28422811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19176 + ... + 20604.

Almost surely, 2^28422810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28422810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42162120).

28422810 is an abundant number, since it is smaller than the sum of its proper divisors (55901430).

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

28422810 is a wasteful number, since it uses less digits than its factorization.

28422810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472 (or 1469 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 28422810 is about 5331.3047183593. The cubic root of 28422810 is about 305.1797202912.

The spelling of 28422810 in words is "twenty-eight million, four hundred twenty-two thousand, eight hundred ten".