28486272 has 64 divisors (see below), whose sum is σ = 78140160. Its totient is φ = 9185280.

The previous prime is 28486261. The next prime is 28486307. The reversal of 28486272 is 27268482.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×28486272² = 1622935384915968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28486272.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10708 + ... + 13100.

It is an arithmetic number, because the mean of its divisors is an integer number (1220940).

Almost surely, 2^28486272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28486272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39070080).

28486272 is an abundant number, since it is smaller than the sum of its proper divisors (49653888).

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

28486272 is a wasteful number, since it uses less digits than its factorization.

28486272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441 (or 2429 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 28486272 is about 5337.2532261454. The cubic root of 28486272 is about 305.4066849359.

The spelling of 28486272 in words is "twenty-eight million, four hundred eighty-six thousand, two hundred seventy-two".