28428360 has 64 divisors (see below), whose sum is σ = 85726080. Its totient is φ = 7541760.

The previous prime is 28428353. The next prime is 28428371. The reversal of 28428360 is 6382482.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28429 + ... + 29411.

It is an arithmetic number, because the mean of its divisors is an integer number (1339470).

Almost surely, 2^28428360 is an apocalyptic number.

28428360 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 28428360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42863040).

28428360 is an abundant number, since it is smaller than the sum of its proper divisors (57297720).

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

28428360 is a wasteful number, since it uses less digits than its factorization.

28428360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28428360 is about 5331.8252034364. The cubic root of 28428360 is about 305.1995827094.

The spelling of 28428360 in words is "twenty-eight million, four hundred twenty-eight thousand, three hundred sixty".