28000503025 has 24 divisors (see below), whose sum is σ = 39523881024. Its totient is φ = 19478606400.

The previous prime is 28000503019. The next prime is 28000503049. The reversal of 28000503025 is 52030500082.

It is not a de Polignac number, because 28000503025 - 2⁹ = 28000502513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2207154 + ... + 2219803.

It is an arithmetic number, because the mean of its divisors is an integer number (1646828376).

Almost surely, 2^28000503025 is an apocalyptic number.

28000503025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28000503025 is a deficient number, since it is larger than the sum of its proper divisors (11523377999).

28000503025 is a wasteful number, since it uses less digits than its factorization.

28000503025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4427001 (or 4426996 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 28000503025 in words is "twenty-eight billion, five hundred three thousand, twenty-five".