28585660 has 12 divisors (see below), whose sum is σ = 60029928. Its totient is φ = 11434256.

The previous prime is 28585657. The next prime is 28585663. The reversal of 28585660 is 6658582.

It is an interprime number because it is at equal distance from previous prime (28585657) and next prime (28585663).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28585663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714622 + ... + 714661.

It is an arithmetic number, because the mean of its divisors is an integer number (5002494).

Almost surely, 2^28585660 is an apocalyptic number.

28585660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28585660 is an abundant number, since it is smaller than the sum of its proper divisors (31444268).

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

28585660 is a wasteful number, since it uses less digits than its factorization.

28585660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429292 (or 1429290 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 28585660 is about 5346.5559007645. Note that the first 3 decimals coincide. The cubic root of 28585660 is about 305.7614584757.

The spelling of 28585660 in words is "twenty-eight million, five hundred eighty-five thousand, six hundred sixty".