28274700 has 54 divisors (see below), whose sum is σ = 82075476. Its totient is φ = 7515360.

The previous prime is 28274699. The next prime is 28274711. The reversal of 28274700 is 747282.

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 91947 + ... + 92253.

Almost surely, 2^28274700 is an apocalyptic number.

28274700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28274700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41037738).

28274700 is an abundant number, since it is smaller than the sum of its proper divisors (53800776).

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

28274700 is a wasteful number, since it uses less digits than its factorization.

28274700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 28274700 is about 5317.3959792365. The cubic root of 28274700 is about 304.6487041991.

The spelling of 28274700 in words is "twenty-eight million, two hundred seventy-four thousand, seven hundred".