28772027 has 4 divisors (see below), whose sum is σ = 28979160. Its totient is φ = 28564896.

The previous prime is 28771997. The next prime is 28772063. The reversal of 28772027 is 72027782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28772027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28772077) 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, 103358 + ... + 103635.

It is an arithmetic number, because the mean of its divisors is an integer number (7244790).

Almost surely, 2^28772027 is an apocalyptic number.

28772027 is a deficient number, since it is larger than the sum of its proper divisors (207133).

28772027 is a wasteful number, since it uses less digits than its factorization.

28772027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207132.

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 28772027 is about 5363.9562824468. The cubic root of 28772027 is about 306.4245001905.

The spelling of 28772027 in words is "twenty-eight million, seven hundred seventy-two thousand, twenty-seven".