28485549 has 24 divisors (see below), whose sum is σ = 42112512. Its totient is φ = 18550080.

The previous prime is 28485547. The next prime is 28485551. The reversal of 28485549 is 94558482.

28485549 is a `hidden beast` number, since 28 + 4 + 85 + 549 = 666.

It is an interprime number because it is at equal distance from previous prime (28485547) and next prime (28485551).

It is not a de Polignac number, because 28485549 - 2¹ = 28485547 is a prime.

It is a super-2 number, since 2×28485549² = 1622853003662802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28485547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125374 + ... + 125600.

It is an arithmetic number, because the mean of its divisors is an integer number (1754688).

Almost surely, 2^28485549 is an apocalyptic number.

It is an amenable number.

28485549 is a deficient number, since it is larger than the sum of its proper divisors (13626963).

28485549 is a wasteful number, since it uses less digits than its factorization.

28485549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 494 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 28485549 is about 5337.1854942469. The cubic root of 28485549 is about 305.4041011076.

The spelling of 28485549 in words is "twenty-eight million, four hundred eighty-five thousand, five hundred forty-nine".