28114520 has 128 divisors (see below), whose sum is σ = 77414400. Its totient is φ = 8985600.

The previous prime is 28114519. The next prime is 28114523. The reversal of 28114520 is 2541182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28114523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355841 + ... + 355919.

It is an arithmetic number, because the mean of its divisors is an integer number (604800).

Almost surely, 2^28114520 is an apocalyptic number.

28114520 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 28114520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38707200).

28114520 is an abundant number, since it is smaller than the sum of its proper divisors (49299880).

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

28114520 is a wasteful number, since it uses less digits than its factorization.

28114520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 28114520 is about 5302.3127029627. The cubic root of 28114520 is about 304.0723223590.

The spelling of 28114520 in words is "twenty-eight million, one hundred fourteen thousand, five hundred twenty".