28047412 has 6 divisors (see below), whose sum is σ = 49082978. Its totient is φ = 14023704.

The previous prime is 28047407. The next prime is 28047413. The reversal of 28047412 is 21474082.

It can be written as a sum of positive squares in only one way, i.e., 22316176 + 5731236 = 4724^2 + 2394^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28047413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3505923 + ... + 3505930.

Almost surely, 2^28047412 is an apocalyptic number.

It is an amenable number.

28047412 is a deficient number, since it is larger than the sum of its proper divisors (21035566).

28047412 is a wasteful number, since it uses less digits than its factorization.

28047412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7011857 (or 7011855 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 28047412 is about 5295.9807401462. The cubic root of 28047412 is about 303.8301942965.

The spelling of 28047412 in words is "twenty-eight million, forty-seven thousand, four hundred twelve".