28614320 has 80 divisors (see below), whose sum is σ = 78143808. Its totient is φ = 9538560.

The previous prime is 28614319. The next prime is 28614367. The reversal of 28614320 is 2341682.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 28614320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20030 + ... + 21410.

Almost surely, 2^28614320 is an apocalyptic number.

28614320 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 28614320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39071904).

28614320 is an abundant number, since it is smaller than the sum of its proper divisors (49529488).

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

28614320 is a wasteful number, since it uses less digits than its factorization.

28614320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438 (or 1432 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 28614320 is about 5349.2354593904. The cubic root of 28614320 is about 305.8636098853.

The spelling of 28614320 in words is "twenty-eight million, six hundred fourteen thousand, three hundred twenty".