28601908 has 6 divisors (see below), whose sum is σ = 50053346. Its totient is φ = 14300952.

The previous prime is 28601899. The next prime is 28601921. The reversal of 28601908 is 80910682.

It can be written as a sum of positive squares in only one way, i.e., 27751824 + 850084 = 5268^2 + 922^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3575235 + ... + 3575242.

Almost surely, 2^28601908 is an apocalyptic number.

It is an amenable number.

28601908 is a deficient number, since it is larger than the sum of its proper divisors (21451438).

28601908 is a wasteful number, since it uses less digits than its factorization.

28601908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7150481 (or 7150479 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 28601908 is about 5348.0751677590. The cubic root of 28601908 is about 305.8193787896.

The spelling of 28601908 in words is "twenty-eight million, six hundred one thousand, nine hundred eight".