28718460 has 72 divisors (see below), whose sum is σ = 88015200. Its totient is φ = 7579008.

The previous prime is 28718449. The next prime is 28718471. The reversal of 28718460 is 6481782.

It is an interprime number because it is at equal distance from previous prime (28718449) and next prime (28718471).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17766 + ... + 19314.

Almost surely, 2^28718460 is an apocalyptic number.

28718460 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 28718460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44007600).

28718460 is an abundant number, since it is smaller than the sum of its proper divisors (59296740).

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

28718460 is a wasteful number, since it uses less digits than its factorization.

28718460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667 (or 1662 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28718460 is about 5358.9607201397. The cubic root of 28718460 is about 306.2342177068.

The spelling of 28718460 in words is "twenty-eight million, seven hundred eighteen thousand, four hundred sixty".