28632566 has 4 divisors (see below), whose sum is σ = 42948852. Its totient is φ = 14316282.

The previous prime is 28632559. The next prime is 28632577. The reversal of 28632566 is 66523682.

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

It is a super-4 number, since 4×28632566⁴ (a number of 31 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7158140 + ... + 7158143.

It is an arithmetic number, because the mean of its divisors is an integer number (10737213).

Almost surely, 2^28632566 is an apocalyptic number.

28632566 is a deficient number, since it is larger than the sum of its proper divisors (14316286).

28632566 is a wasteful number, since it uses less digits than its factorization.

28632566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14316285.

The product of its digits is 103680, while the sum is 38.

The square root of 28632566 is about 5350.9406649672. The cubic root of 28632566 is about 305.9286076632.

The spelling of 28632566 in words is "twenty-eight million, six hundred thirty-two thousand, five hundred sixty-six".