28700360 has 64 divisors (see below), whose sum is σ = 70383600. Its totient is φ = 10469376.

The previous prime is 28700333. The next prime is 28700381. The reversal of 28700360 is 6300782.

It can be written as a sum of positive squares in 8 ways, for example, as 2669956 + 26030404 = 1634^2 + 5102^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 50156 + ... + 50724.

Almost surely, 2^28700360 is an apocalyptic number.

28700360 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 28700360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35191800).

28700360 is an abundant number, since it is smaller than the sum of its proper divisors (41683240).

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

28700360 is a wasteful number, since it uses less digits than its factorization.

28700360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 28700360 is about 5357.2716936889. The cubic root of 28700360 is about 306.1698688034.

The spelling of 28700360 in words is "twenty-eight million, seven hundred thousand, three hundred sixty".