28020125 has 32 divisors (see below), whose sum is σ = 41293824. Its totient is φ = 18576000.

The previous prime is 28020107. The next prime is 28020151. The reversal of 28020125 is 52102082.

It is not a de Polignac number, because 28020125 - 2¹² = 28016029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28020097 and 28020106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26609 + ... + 27641.

It is an arithmetic number, because the mean of its divisors is an integer number (1290432).

Almost surely, 2^28020125 is an apocalyptic number.

28020125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28020125 is a deficient number, since it is larger than the sum of its proper divisors (13273699).

28020125 is a wasteful number, since it uses less digits than its factorization.

28020125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 28020125 is about 5293.4039143069. The cubic root of 28020125 is about 303.7316313752.

The spelling of 28020125 in words is "twenty-eight million, twenty thousand, one hundred twenty-five".