28314437 has 8 divisors (see below), whose sum is σ = 28804056. Its totient is φ = 27827712.

The previous prime is 28314421. The next prime is 28314457. The reversal of 28314437 is 73441382.

It can be written as a sum of positive squares in 4 ways, for example, as 13942756 + 14371681 = 3734^2 + 3791^2 .

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 28314437 - 2⁴ = 28314421 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 (28314457) 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, 28493 + ... + 29469.

It is an arithmetic number, because the mean of its divisors is an integer number (3600507).

Almost surely, 2^28314437 is an apocalyptic number.

It is an amenable number.

28314437 is a deficient number, since it is larger than the sum of its proper divisors (489619).

28314437 is an equidigital number, since it uses as much as digits as its factorization.

28314437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447.

The product of its digits is 16128, while the sum is 32.

The square root of 28314437 is about 5321.1311767330. The cubic root of 28314437 is about 304.7913542106.

The spelling of 28314437 in words is "twenty-eight million, three hundred fourteen thousand, four hundred thirty-seven".