28062720 has 352 divisors, whose sum is σ = 117907200. Its totient is φ = 6193152.

The previous prime is 28062707. The next prime is 28062731. The reversal of 28062720 is 2726082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 967666 + ... + 967694.

Almost surely, 2^28062720 is an apocalyptic number.

28062720 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 28062720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58953600).

28062720 is an abundant number, since it is smaller than the sum of its proper divisors (89844480).

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

28062720 is a wasteful number, since it uses less digits than its factorization.

28062720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28062720 is about 5297.4257899474. The cubic root of 28062720 is about 303.8854600813.

28062720 divided by its product of nonzero digits (2688) gives a triangular number (10440 = T₁₄₄).

It can be divided in two parts, 28062 and 720, that added together give a palindrome (28782).

The spelling of 28062720 in words is "twenty-eight million, sixty-two thousand, seven hundred twenty".