28196520 has 128 divisors (see below), whose sum is σ = 94711680. Its totient is φ = 6656000.

The previous prime is 28196471. The next prime is 28196521. The reversal of 28196520 is 2569182.

It is a super-2 number, since 2×28196520² = 1590087480220800, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (28196521) 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, 53860 + ... + 54380.

It is an arithmetic number, because the mean of its divisors is an integer number (739935).

Almost surely, 2^28196520 is an apocalyptic number.

28196520 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 28196520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47355840).

28196520 is an abundant number, since it is smaller than the sum of its proper divisors (66515160).

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

28196520 is a wasteful number, since it uses less digits than its factorization.

28196520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 28196520 is about 5310.0395478753. The cubic root of 28196520 is about 304.3676588200.

It can be divided in two parts, 2819 and 6520, that added together give a palindrome (9339).

The spelling of 28196520 in words is "twenty-eight million, one hundred ninety-six thousand, five hundred twenty".