28485216 has 48 divisors (see below), whose sum is σ = 83084400. Its totient is φ = 9494784.

The previous prime is 28485209. The next prime is 28485239. The reversal of 28485216 is 61258482.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×28485216² = 1622815061133312, which contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15621 + ... + 17348.

It is an arithmetic number, because the mean of its divisors is an integer number (1730925).

Almost surely, 2^28485216 is an apocalyptic number.

It is an amenable number.

28485216 is an abundant number, since it is smaller than the sum of its proper divisors (54599184).

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

28485216 is a wasteful number, since it uses less digits than its factorization.

28485216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32988 (or 32974 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 28485216 is about 5337.1542979382. The cubic root of 28485216 is about 305.4029110310.

The spelling of 28485216 in words is "twenty-eight million, four hundred eighty-five thousand, two hundred sixteen".