28710668 has 54 divisors (see below), whose sum is σ = 60630444. Its totient is φ = 11860128.

The previous prime is 28710659. The next prime is 28710677. The reversal of 28710668 is 86601782.

It is an interprime number because it is at equal distance from previous prime (28710659) and next prime (28710677).

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, 268271 + ... + 268377.

It is an arithmetic number, because the mean of its divisors is an integer number (1122786).

Almost surely, 2^28710668 is an apocalyptic number.

28710668 is a gapful number since it is divisible by the number (28) 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 28710668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30315222).

28710668 is an abundant number, since it is smaller than the sum of its proper divisors (31919776).

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

28710668 is a wasteful number, since it uses less digits than its factorization.

28710668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 28710668 is about 5358.2336641845. The cubic root of 28710668 is about 306.2065189970.

The spelling of 28710668 in words is "twenty-eight million, seven hundred ten thousand, six hundred sixty-eight".