28214825 has 12 divisors (see below), whose sum is σ = 36193740. Its totient is φ = 21792960.

The previous prime is 28214821. The next prime is 28214827. The reversal of 28214825 is 52841282.

It can be written as a sum of positive squares in 6 ways, for example, as 3374569 + 24840256 = 1837^2 + 4984^2 .

It is not a de Polignac number, because 28214825 - 2² = 28214821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28214791 and 28214800.

It is not an unprimeable number, because it can be changed into a prime (28214821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18734 + ... + 20183.

It is an arithmetic number, because the mean of its divisors is an integer number (3016145).

Almost surely, 2^28214825 is an apocalyptic number.

28214825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28214825 is a deficient number, since it is larger than the sum of its proper divisors (7978915).

28214825 is a wasteful number, since it uses less digits than its factorization.

28214825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38956 (or 38951 counting only the distinct ones).

The product of its digits is 10240, while the sum is 32.

The square root of 28214825 is about 5311.7628900394. The cubic root of 28214825 is about 304.4335090830.

The spelling of 28214825 in words is "twenty-eight million, two hundred fourteen thousand, eight hundred twenty-five".