28380700 has 18 divisors (see below), whose sum is σ = 61586336. Its totient is φ = 11352240.

The previous prime is 28380673. The next prime is 28380707. The reversal of 28380700 is 708382.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141804 + ... + 142003.

Almost surely, 2^28380700 is an apocalyptic number.

28380700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28380700 is an abundant number, since it is smaller than the sum of its proper divisors (33205636).

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

28380700 is a wasteful number, since it uses less digits than its factorization.

28380700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283821 (or 283814 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28380700 is about 5327.3539398091. The cubic root of 28380700 is about 305.0289321296.

The spelling of 28380700 in words is "twenty-eight million, three hundred eighty thousand, seven hundred".