28734925 has 12 divisors (see below), whose sum is σ = 35863156. Its totient is φ = 22838400.

The previous prime is 28734919. The next prime is 28734929. The reversal of 28734925 is 52943782.

It can be written as a sum of positive squares in 6 ways, for example, as 10055241 + 18679684 = 3171^2 + 4322^2 .

It is not a de Polignac number, because 28734925 - 2⁹ = 28734413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28734929) 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, 265 + ... + 7585.

Almost surely, 2^28734925 is an apocalyptic number.

28734925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28734925 is a deficient number, since it is larger than the sum of its proper divisors (7128231).

28734925 is a wasteful number, since it uses less digits than its factorization.

28734925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7488 (or 7483 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 28734925 is about 5360.4967120594. The cubic root of 28734925 is about 306.2927303975.

The spelling of 28734925 in words is "twenty-eight million, seven hundred thirty-four thousand, nine hundred twenty-five".