28378200 has 48 divisors (see below), whose sum is σ = 87974280. Its totient is φ = 7567360.

The previous prime is 28378199. The next prime is 28378247. The reversal of 28378200 is 287382.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23049 + ... + 24248.

Almost surely, 2^28378200 is an apocalyptic number.

28378200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28378200 is an abundant number, since it is smaller than the sum of its proper divisors (59596080).

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

28378200 is a wasteful number, since it uses less digits than its factorization.

28378200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47316 (or 47307 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28378200 is about 5327.1192965805. The cubic root of 28378200 is about 305.0199754005.

The spelling of 28378200 in words is "twenty-eight million, three hundred seventy-eight thousand, two hundred".