28250361 has 6 divisors (see below), whose sum is σ = 40806090. Its totient is φ = 18833568.

The previous prime is 28250357. The next prime is 28250389. The reversal of 28250361 is 16305282.

It can be written as a sum of positive squares in only one way, i.e., 16451136 + 11799225 = 4056^2 + 3435^2 .

It is not a de Polignac number, because 28250361 - 2² = 28250357 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28250161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1569456 + ... + 1569473.

It is an arithmetic number, because the mean of its divisors is an integer number (6801015).

Almost surely, 2^28250361 is an apocalyptic number.

It is an amenable number.

28250361 is a deficient number, since it is larger than the sum of its proper divisors (12555729).

28250361 is a wasteful number, since it uses less digits than its factorization.

28250361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138935 (or 3138932 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 28250361 is about 5315.1068662822. The cubic root of 28250361 is about 304.5612647401.

The spelling of 28250361 in words is "twenty-eight million, two hundred fifty thousand, three hundred sixty-one".