28457925 has 12 divisors (see below), whose sum is σ = 47050560. Its totient is φ = 15177520.

The previous prime is 28457917. The next prime is 28457929. The reversal of 28457925 is 52975482.

It is not a de Polignac number, because 28457925 - 2³ = 28457917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28457929) 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, 189645 + ... + 189794.

It is an arithmetic number, because the mean of its divisors is an integer number (3920880).

Almost surely, 2^28457925 is an apocalyptic number.

28457925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28457925 is a deficient number, since it is larger than the sum of its proper divisors (18592635).

28457925 is a wasteful number, since it uses less digits than its factorization.

28457925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379452 (or 379447 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 28457925 is about 5334.5969857150. The cubic root of 28457925 is about 305.3053468063.

The spelling of 28457925 in words is "twenty-eight million, four hundred fifty-seven thousand, nine hundred twenty-five".