28207425 has 12 divisors (see below), whose sum is σ = 46636400. Its totient is φ = 15043920.

The previous prime is 28207423. The next prime is 28207429. The reversal of 28207425 is 52470282.

It is not a de Polignac number, because 28207425 - 2¹ = 28207423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28207392 and 28207401.

It is not an unprimeable number, because it can be changed into a prime (28207423) 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, 187975 + ... + 188124.

Almost surely, 2^28207425 is an apocalyptic number.

28207425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28207425 is a deficient number, since it is larger than the sum of its proper divisors (18428975).

28207425 is a wasteful number, since it uses less digits than its factorization.

28207425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376112 (or 376107 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 28207425 is about 5311.0662771236. The cubic root of 28207425 is about 304.4068918118.

The spelling of 28207425 in words is "twenty-eight million, two hundred seven thousand, four hundred twenty-five".