28271425 has 72 divisors (see below), whose sum is σ = 46899776. Its totient is φ = 16450560.

The previous prime is 28271423. The next prime is 28271429. The reversal of 28271425 is 52417282.

It is a happy number.

It is not a de Polignac number, because 28271425 - 2¹ = 28271423 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28271423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 657454 + ... + 657496.

Almost surely, 2^28271425 is an apocalyptic number.

28271425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28271425 is a deficient number, since it is larger than the sum of its proper divisors (18628351).

28271425 is a wasteful number, since it uses less digits than its factorization.

28271425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 85 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 28271425 is about 5317.0880188314. The cubic root of 28271425 is about 304.6369414685.

The spelling of 28271425 in words is "twenty-eight million, two hundred seventy-one thousand, four hundred twenty-five".