28772313 has 8 divisors (see below), whose sum is σ = 40619808. Its totient is φ = 18053184.

The previous prime is 28772299. The next prime is 28772323. The reversal of 28772313 is 31327782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28772313 - 2⁹ = 28771801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28772323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282031 + ... + 282132.

It is an arithmetic number, because the mean of its divisors is an integer number (5077476).

Almost surely, 2^28772313 is an apocalyptic number.

It is an amenable number.

28772313 is a deficient number, since it is larger than the sum of its proper divisors (11847495).

28772313 is a wasteful number, since it uses less digits than its factorization.

28772313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564183.

The product of its digits is 14112, while the sum is 33.

The square root of 28772313 is about 5363.9829418073. The cubic root of 28772313 is about 306.4255154952.

The spelling of 28772313 in words is "twenty-eight million, seven hundred seventy-two thousand, three hundred thirteen".