28087000 has 32 divisors (see below), whose sum is σ = 65725920. Its totient is φ = 11234400.

The previous prime is 28086991. The next prime is 28087001. The reversal of 28087000 is 78082.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28087001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13044 + ... + 15043.

It is an arithmetic number, because the mean of its divisors is an integer number (2053935).

Almost surely, 2^28087000 is an apocalyptic number.

28087000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28087000 is an abundant number, since it is smaller than the sum of its proper divisors (37638920).

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

28087000 is a wasteful number, since it uses less digits than its factorization.

28087000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28108 (or 28094 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 28087000 is about 5299.7169735751. The cubic root of 28087000 is about 303.9730758703.

The spelling of 28087000 in words is "twenty-eight million, eighty-seven thousand".