28053330 has 64 divisors (see below), whose sum is σ = 71089920. Its totient is φ = 7070976.

The previous prime is 28053293. The next prime is 28053331. The reversal of 28053330 is 3335082.

It is a self number, because there is not a number n which added to its sum of digits gives 28053330.

It is not an unprimeable number, because it can be changed into a prime (28053331) 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, 75024 + ... + 75396.

It is an arithmetic number, because the mean of its divisors is an integer number (1110780).

Almost surely, 2^28053330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28053330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35544960).

28053330 is an abundant number, since it is smaller than the sum of its proper divisors (43036590).

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

28053330 is a wasteful number, since it uses less digits than its factorization.

28053330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 28053330 is about 5296.5394362735. The cubic root of 28053330 is about 303.8515621698.

The spelling of 28053330 in words is "twenty-eight million, fifty-three thousand, three hundred thirty".