28064901 has 4 divisors (see below), whose sum is σ = 37419872. Its totient is φ = 18709932.

The previous prime is 28064891. The next prime is 28064921. The reversal of 28064901 is 10946082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28064901 - 2²² = 23870597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28064921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4677481 + ... + 4677486.

It is an arithmetic number, because the mean of its divisors is an integer number (9354968).

Almost surely, 2^28064901 is an apocalyptic number.

It is an amenable number.

28064901 is a deficient number, since it is larger than the sum of its proper divisors (9354971).

28064901 is an equidigital number, since it uses as much as digits as its factorization.

28064901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9354970.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 28064901 is about 5297.6316406485. The cubic root of 28064901 is about 303.8933324118.

The spelling of 28064901 in words is "twenty-eight million, sixty-four thousand, nine hundred one".