28005025320 has 64 divisors (see below), whose sum is σ = 93350088000. Its totient is φ = 7468006464.

The previous prime is 28005025313. The next prime is 28005025387. The reversal of 28005025320 is 2352050082.

28005025320 is a `hidden beast` number, since 2 + 80 + 0 + 50 + 2 + 532 + 0 = 666.

It is a super-2 number, since 2×28005025320² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12964210 + ... + 12966369.

It is an arithmetic number, because the mean of its divisors is an integer number (1458595125).

Almost surely, 2^28005025320 is an apocalyptic number.

28005025320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28005025320 is an abundant number, since it is smaller than the sum of its proper divisors (65345062680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28005025320 is a wasteful number, since it uses less digits than its factorization.

28005025320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25930599 (or 25930589 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 28005025320 in words is "twenty-eight billion, five million, twenty-five thousand, three hundred twenty".