28478300 has 18 divisors (see below), whose sum is σ = 61798128. Its totient is φ = 11391280.

The previous prime is 28478279. The next prime is 28478311. The reversal of 28478300 is 387482.

It is a super-2 number, since 2×28478300² = 1622027141780000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142292 + ... + 142491.

Almost surely, 2^28478300 is an apocalyptic number.

28478300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28478300 is an abundant number, since it is smaller than the sum of its proper divisors (33319828).

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

28478300 is a wasteful number, since it uses less digits than its factorization.

28478300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284797 (or 284790 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28478300 is about 5336.5063477897. The cubic root of 28478300 is about 305.3781925068.

The spelling of 28478300 in words is "twenty-eight million, four hundred seventy-eight thousand, three hundred".