28351251 has 12 divisors (see below), whose sum is σ = 41563912. Its totient is φ = 18618336.

The previous prime is 28351247. The next prime is 28351259. The reversal of 28351251 is 15215382.

It is a happy number.

It is not a de Polignac number, because 28351251 - 2² = 28351247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28351259) 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, 22906 + ... + 24111.

Almost surely, 2^28351251 is an apocalyptic number.

28351251 is a deficient number, since it is larger than the sum of its proper divisors (13212661).

28351251 is a wasteful number, since it uses less digits than its factorization.

28351251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47090 (or 47087 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 28351251 is about 5324.5892799351. The cubic root of 28351251 is about 304.9233920291.

The spelling of 28351251 in words is "twenty-eight million, three hundred fifty-one thousand, two hundred fifty-one".