28295520 has 192 divisors, whose sum is σ = 101896704. Its totient is φ = 6533120.

The previous prime is 28295479. The next prime is 28295557. The reversal of 28295520 is 2559282.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121324 + ... + 121556.

It is an arithmetic number, because the mean of its divisors is an integer number (530712).

Almost surely, 2^28295520 is an apocalyptic number.

28295520 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 28295520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50948352).

28295520 is an abundant number, since it is smaller than the sum of its proper divisors (73601184).

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

28295520 is a wasteful number, since it uses less digits than its factorization.

28295520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28295520 is about 5319.3533441575. The cubic root of 28295520 is about 304.7234616068.

The spelling of 28295520 in words is "twenty-eight million, two hundred ninety-five thousand, five hundred twenty".