28251953 has 2 divisors, whose sum is σ = 28251954. Its totient is φ = 28251952.

The previous prime is 28251907. The next prime is 28251961. The reversal of 28251953 is 35915282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22061809 + 6190144 = 4697^2 + 2488^2 .

It is a cyclic number.

It is not a de Polignac number, because 28251953 - 2⁸ = 28251697 is a prime.

It is not a weakly prime, because it can be changed into another prime (28251053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14125976 + 14125977.

It is an arithmetic number, because the mean of its divisors is an integer number (14125977).

Almost surely, 2^28251953 is an apocalyptic number.

It is an amenable number.

28251953 is a deficient number, since it is larger than the sum of its proper divisors (1).

28251953 is an equidigital number, since it uses as much as digits as its factorization.

28251953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 35.

The square root of 28251953 is about 5315.2566259777. The cubic root of 28251953 is about 304.5669856396.

The spelling of 28251953 in words is "twenty-eight million, two hundred fifty-one thousand, nine hundred fifty-three".