28904701 has 4 divisors (see below), whose sum is σ = 33033952. Its totient is φ = 24775452.

The previous prime is 28904647. The next prime is 28904717. The reversal of 28904701 is 10740982.

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 a cyclic number.

It is not a de Polignac number, because 28904701 - 2⁹ = 28904189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28904731) 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, 2064615 + ... + 2064628.

It is an arithmetic number, because the mean of its divisors is an integer number (8258488).

Almost surely, 2^28904701 is an apocalyptic number.

It is an amenable number.

28904701 is a deficient number, since it is larger than the sum of its proper divisors (4129251).

28904701 is an equidigital number, since it uses as much as digits as its factorization.

28904701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129250.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 28904701 is about 5376.3092358978. The cubic root of 28904701 is about 306.8947744927.

The spelling of 28904701 in words is "twenty-eight million, nine hundred four thousand, seven hundred one".