28757012 has 6 divisors (see below), whose sum is σ = 50324778. Its totient is φ = 14378504.

The previous prime is 28757011. The next prime is 28757021. The reversal of 28757012 is 21075782.

It can be written as a sum of positive squares in only one way, i.e., 26584336 + 2172676 = 5156^2 + 1474^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28757012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28757011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3594623 + ... + 3594630.

It is an arithmetic number, because the mean of its divisors is an integer number (8387463).

Almost surely, 2^28757012 is an apocalyptic number.

It is an amenable number.

28757012 is a deficient number, since it is larger than the sum of its proper divisors (21567766).

28757012 is a wasteful number, since it uses less digits than its factorization.

28757012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7189257 (or 7189255 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 28757012 is about 5362.5564798890. The cubic root of 28757012 is about 306.3711872458.

The spelling of 28757012 in words is "twenty-eight million, seven hundred fifty-seven thousand, twelve".