28523425 has 24 divisors (see below), whose sum is σ = 40622400. Its totient is φ = 19462080.

The previous prime is 28523423. The next prime is 28523431. The reversal of 28523425 is 52432582.

It is not a de Polignac number, because 28523425 - 2¹ = 28523423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28523423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67866 + ... + 68284.

It is an arithmetic number, because the mean of its divisors is an integer number (1692600).

Almost surely, 2^28523425 is an apocalyptic number.

28523425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28523425 is a deficient number, since it is larger than the sum of its proper divisors (12098975).

28523425 is a wasteful number, since it uses less digits than its factorization.

28523425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 820 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 28523425 is about 5340.7326276458. The cubic root of 28523425 is about 305.5394020233.

The spelling of 28523425 in words is "twenty-eight million, five hundred twenty-three thousand, four hundred twenty-five".