28914245 has 8 divisors (see below), whose sum is σ = 35055384. Its totient is φ = 22892544.

The previous prime is 28914241. The next prime is 28914269. The reversal of 28914245 is 54241982.

It can be written as a sum of positive squares in 4 ways, for example, as 10647169 + 18267076 = 3263^2 + 4274^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28914245 - 2² = 28914241 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28914241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29324 + ... + 30293.

It is an arithmetic number, because the mean of its divisors is an integer number (4381923).

Almost surely, 2^28914245 is an apocalyptic number.

It is an amenable number.

28914245 is a deficient number, since it is larger than the sum of its proper divisors (6141139).

28914245 is an equidigital number, since it uses as much as digits as its factorization.

28914245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59719.

The product of its digits is 23040, while the sum is 35.

The square root of 28914245 is about 5377.1967603948. The cubic root of 28914245 is about 306.9285484846.

Subtracting from 28914245 its sum of digits (35), we obtain a triangular number (28914210 = T₇₆₀₄).

The spelling of 28914245 in words is "twenty-eight million, nine hundred fourteen thousand, two hundred forty-five".