28706012 has 12 divisors (see below), whose sum is σ = 50273160. Its totient is φ = 14342256.

The previous prime is 28706011. The next prime is 28706033. The reversal of 28706012 is 21060782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28706011) 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, 8414 + ... + 11322.

It is an arithmetic number, because the mean of its divisors is an integer number (4189430).

Almost surely, 2^28706012 is an apocalyptic number.

It is an amenable number.

28706012 is a deficient number, since it is larger than the sum of its proper divisors (21567148).

28706012 is a wasteful number, since it uses less digits than its factorization.

28706012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5380 (or 5378 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 28706012 is about 5357.7991750345. The cubic root of 28706012 is about 306.1899656305.

Adding to 28706012 its reverse (21060782), we get a palindrome (49766794).

The spelling of 28706012 in words is "twenty-eight million, seven hundred six thousand, twelve".