28697012 has 6 divisors (see below), whose sum is σ = 50219778. Its totient is φ = 14348504.

The previous prime is 28696999. The next prime is 28697021. The reversal of 28697012 is 21079682.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26275876 + 2421136 = 5126^2 + 1556^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3587123 + ... + 3587130.

It is an arithmetic number, because the mean of its divisors is an integer number (8369963).

Almost surely, 2^28697012 is an apocalyptic number.

It is an amenable number.

28697012 is a deficient number, since it is larger than the sum of its proper divisors (21522766).

28697012 is a wasteful number, since it uses less digits than its factorization.

28697012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7174257 (or 7174255 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 28697012 is about 5356.9592120904. The cubic root of 28697012 is about 306.1579630691.

The spelling of 28697012 in words is "twenty-eight million, six hundred ninety-seven thousand, twelve".