28614321 has 24 divisors (see below), whose sum is σ = 42424200. Its totient is φ = 18579456.

The previous prime is 28614319. The next prime is 28614367. The reversal of 28614321 is 12341682.

28614321 is a `hidden beast` number, since 28 + 614 + 3 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5574321 + 23040000 = 2361^2 + 4800^2 .

It is not a de Polignac number, because 28614321 - 2¹ = 28614319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28614371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63505 + ... + 63953.

It is an arithmetic number, because the mean of its divisors is an integer number (1767675).

Almost surely, 2^28614321 is an apocalyptic number.

It is an amenable number.

28614321 is a deficient number, since it is larger than the sum of its proper divisors (13809879).

28614321 is a wasteful number, since it uses less digits than its factorization.

28614321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 622 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 28614321 is about 5349.2355528617. The cubic root of 28614321 is about 305.8636134484.

The spelling of 28614321 in words is "twenty-eight million, six hundred fourteen thousand, three hundred twenty-one".