28743660 has 120 divisors (see below), whose sum is σ = 98428176. Its totient is φ = 6963840.

The previous prime is 28743653. The next prime is 28743661. The reversal of 28743660 is 6634782.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28743661) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17014 + ... + 18626.

Almost surely, 2^28743660 is an apocalyptic number.

28743660 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 28743660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49214088).

28743660 is an abundant number, since it is smaller than the sum of its proper divisors (69684516).

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

28743660 is a wasteful number, since it uses less digits than its factorization.

28743660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 28743660 is about 5361.3114067362. The cubic root of 28743660 is about 306.3237634342.

It can be divided in two parts, 287436 and 60, that added together give a cube (287496 = 66³).

The spelling of 28743660 in words is "twenty-eight million, seven hundred forty-three thousand, six hundred sixty".