28306901 has 12 divisors (see below), whose sum is σ = 32800992. Its totient is φ = 23929896.

The previous prime is 28306891. The next prime is 28306931. The reversal of 28306901 is 10960382.

It is a de Polignac number, because none of the positive numbers 2^k-28306901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28306931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47930 + ... + 48516.

It is an arithmetic number, because the mean of its divisors is an integer number (2733416).

Almost surely, 2^28306901 is an apocalyptic number.

It is an amenable number.

28306901 is a deficient number, since it is larger than the sum of its proper divisors (4494091).

28306901 is an frugal number, since it uses more digits than its factorization.

28306901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 28306901 is about 5320.4230094984. The cubic root of 28306901 is about 304.7643113343.

The spelling of 28306901 in words is "twenty-eight million, three hundred six thousand, nine hundred one".