28648700 has 18 divisors (see below), whose sum is σ = 62167896. Its totient is φ = 11459440.

The previous prime is 28648699. The next prime is 28648703. The reversal of 28648700 is 784682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28648703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143144 + ... + 143343.

It is an arithmetic number, because the mean of its divisors is an integer number (3453772).

Almost surely, 2^28648700 is an apocalyptic number.

28648700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28648700 is an abundant number, since it is smaller than the sum of its proper divisors (33519196).

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

28648700 is a wasteful number, since it uses less digits than its factorization.

28648700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286501 (or 286494 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 28648700 is about 5352.4480380476. The cubic root of 28648700 is about 305.9860588576.

Subtracting from 28648700 its sum of digits (35), we obtain a triangular number (28648665 = T₇₅₆₉).

The spelling of 28648700 in words is "twenty-eight million, six hundred forty-eight thousand, seven hundred".