28690768 has 10 divisors (see below), whose sum is σ = 55588394. Its totient is φ = 14345376.

The previous prime is 28690763. The next prime is 28690777. The reversal of 28690768 is 86709682.

It can be written as a sum of positive squares in only one way, i.e., 27123264 + 1567504 = 5208^2 + 1252^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28690763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 896571 + ... + 896602.

Almost surely, 2^28690768 is an apocalyptic number.

It is an amenable number.

28690768 is a deficient number, since it is larger than the sum of its proper divisors (26897626).

28690768 is a wasteful number, since it uses less digits than its factorization.

28690768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793181 (or 1793175 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 28690768 is about 5356.3763870736. The cubic root of 28690768 is about 306.1357564716.

The spelling of 28690768 in words is "twenty-eight million, six hundred ninety thousand, seven hundred sixty-eight".