28314949 has 4 divisors (see below), whose sum is σ = 30493036. Its totient is φ = 26136864.

The previous prime is 28314947. The next prime is 28314961. The reversal of 28314949 is 94941382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94941382 = 2 ⋅47470691.

It can be written as a sum of positive squares in 2 ways, for example, as 12830724 + 15484225 = 3582^2 + 3935^2 .

It is not a de Polignac number, because 28314949 - 2¹ = 28314947 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 (28314947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1089024 + ... + 1089049.

It is an arithmetic number, because the mean of its divisors is an integer number (7623259).

Almost surely, 2^28314949 is an apocalyptic number.

It is an amenable number.

28314949 is a deficient number, since it is larger than the sum of its proper divisors (2178087).

28314949 is a wasteful number, since it uses less digits than its factorization.

28314949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178086.

The product of its digits is 62208, while the sum is 40.

The square root of 28314949 is about 5321.1792865868. The cubic root of 28314949 is about 304.7931913445.

The spelling of 28314949 in words is "twenty-eight million, three hundred fourteen thousand, nine hundred forty-nine".