28273525 has 12 divisors (see below), whose sum is σ = 40067872. Its totient is φ = 19387440.

The previous prime is 28273523. The next prime is 28273529. The reversal of 28273525 is 52537282.

It is not a de Polignac number, because 28273525 - 2¹ = 28273523 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28273523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80607 + ... + 80956.

Almost surely, 2^28273525 is an apocalyptic number.

28273525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28273525 is a deficient number, since it is larger than the sum of its proper divisors (11794347).

28273525 is a wasteful number, since it uses less digits than its factorization.

28273525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161580 (or 161575 counting only the distinct ones).

The product of its digits is 33600, while the sum is 34.

The square root of 28273525 is about 5317.2854916771. The cubic root of 28273525 is about 304.6444840873.

The spelling of 28273525 in words is "twenty-eight million, two hundred seventy-three thousand, five hundred twenty-five".