28773527 has 4 divisors (see below), whose sum is σ = 29120280. Its totient is φ = 28426776.

The previous prime is 28773523. The next prime is 28773551. The reversal of 28773527 is 72537782.

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 28773527 - 2² = 28773523 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 (28773523) 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, 173252 + ... + 173417.

It is an arithmetic number, because the mean of its divisors is an integer number (7280070).

Almost surely, 2^28773527 is an apocalyptic number.

28773527 is a deficient number, since it is larger than the sum of its proper divisors (346753).

28773527 is an equidigital number, since it uses as much as digits as its factorization.

28773527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346752.

The product of its digits is 164640, while the sum is 41.

The square root of 28773527 is about 5364.0961027931. The cubic root of 28773527 is about 306.4298251399.

The spelling of 28773527 in words is "twenty-eight million, seven hundred seventy-three thousand, five hundred twenty-seven".