28790063 has 4 divisors (see below), whose sum is σ = 28811640. Its totient is φ = 28768488.

The previous prime is 28790051. The next prime is 28790071. The reversal of 28790063 is 36009782.

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

It is a cyclic number.

It is not a de Polignac number, because 28790063 - 2²² = 24595759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28790023) 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, 8645 + ... + 11502.

It is an arithmetic number, because the mean of its divisors is an integer number (7202910).

Almost surely, 2^28790063 is an apocalyptic number.

28790063 is a deficient number, since it is larger than the sum of its proper divisors (21577).

28790063 is a wasteful number, since it uses less digits than its factorization.

28790063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21576.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 28790063 is about 5365.6372408131. The cubic root of 28790063 is about 306.4885151204.

The spelling of 28790063 in words is "twenty-eight million, seven hundred ninety thousand, sixty-three".