28196307 has 6 divisors (see below), whose sum is σ = 40728012. Its totient is φ = 18797532.

The previous prime is 28196303. The next prime is 28196327. The reversal of 28196307 is 70369182.

28196307 is a `hidden beast` number, since 2 + 8 + 19 + 630 + 7 = 666.

It is not a de Polignac number, because 28196307 - 2² = 28196303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28196303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1566453 + ... + 1566470.

It is an arithmetic number, because the mean of its divisors is an integer number (6788002).

Almost surely, 2^28196307 is an apocalyptic number.

28196307 is a deficient number, since it is larger than the sum of its proper divisors (12531705).

28196307 is a wasteful number, since it uses less digits than its factorization.

28196307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3132929 (or 3132926 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 28196307 is about 5310.0194914896. The cubic root of 28196307 is about 304.3668924077.

The spelling of 28196307 in words is "twenty-eight million, one hundred ninety-six thousand, three hundred seven".