28621296 has 160 divisors (see below), whose sum is σ = 94636800. Its totient is φ = 8190720.

The previous prime is 28621283. The next prime is 28621297. The reversal of 28621296 is 69212682.

It is a happy number.

28621296 is a `hidden beast` number, since 2 + 8 + 621 + 29 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 28621296.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28621297) 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, 90130 + ... + 90446.

It is an arithmetic number, because the mean of its divisors is an integer number (591480).

Almost surely, 2^28621296 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28621296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47318400).

28621296 is an abundant number, since it is smaller than the sum of its proper divisors (66015504).

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

28621296 is a wasteful number, since it uses less digits than its factorization.

28621296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 352 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 28621296 is about 5349.8874754522. The cubic root of 28621296 is about 305.8884637716. Note that the first 3 decimals are identical.

The spelling of 28621296 in words is "twenty-eight million, six hundred twenty-one thousand, two hundred ninety-six".