28623425 has 12 divisors (see below), whose sum is σ = 35581056. Its totient is φ = 22842000.

The previous prime is 28623421. The next prime is 28623449. The reversal of 28623425 is 52432682.

It is not a de Polignac number, because 28623425 - 2² = 28623421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28623391 and 28623400.

It is not an unprimeable number, because it can be changed into a prime (28623421) 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, 11000 + ... + 13350.

It is an arithmetic number, because the mean of its divisors is an integer number (2965088).

Almost surely, 2^28623425 is an apocalyptic number.

28623425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28623425 is a deficient number, since it is larger than the sum of its proper divisors (6957631).

28623425 is a wasteful number, since it uses less digits than its factorization.

28623425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848 (or 2843 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 28623425 is about 5350.0864478997. The cubic root of 28623425 is about 305.8960481055.

The spelling of 28623425 in words is "twenty-eight million, six hundred twenty-three thousand, four hundred twenty-five".