28634120 has 48 divisors (see below), whose sum is σ = 68467140. Its totient is φ = 10775552.

The previous prime is 28634063. The next prime is 28634129. The reversal of 28634120 is 2143682.

It can be written as a sum of positive squares in 6 ways, for example, as 20557156 + 8076964 = 4534^2 + 2842^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28634120.

It is not an unprimeable number, because it can be changed into a prime (28634129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10322 + ... + 12798.

Almost surely, 2^28634120 is an apocalyptic number.

28634120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28634120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34233570).

28634120 is an abundant number, since it is smaller than the sum of its proper divisors (39833020).

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

28634120 is a wasteful number, since it uses less digits than its factorization.

28634120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522 (or 2501 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 28634120 is about 5351.0858711106. The cubic root of 28634120 is about 305.9341422056.

The spelling of 28634120 in words is "twenty-eight million, six hundred thirty-four thousand, one hundred twenty".