28549012 has 12 divisors (see below), whose sum is σ = 50563296. Its totient is φ = 14102360.

The previous prime is 28548977. The next prime is 28549013. The reversal of 28549012 is 21094582.

It is a super-2 number, since 2×28549012² = 1630092172352288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28549013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42664 + ... + 43327.

It is an arithmetic number, because the mean of its divisors is an integer number (4213608).

Almost surely, 2^28549012 is an apocalyptic number.

It is an amenable number.

28549012 is a deficient number, since it is larger than the sum of its proper divisors (22014284).

28549012 is a wasteful number, since it uses less digits than its factorization.

28549012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86078 (or 86076 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 28549012 is about 5343.1275485431. The cubic root of 28549012 is about 305.6307363117.

The spelling of 28549012 in words is "twenty-eight million, five hundred forty-nine thousand, twelve".