28488667 has 4 divisors (see below), whose sum is σ = 28765360. Its totient is φ = 28211976.

The previous prime is 28488653. The next prime is 28488703. The reversal of 28488667 is 76688482.

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 28488667 - 2⁷ = 28488539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28488667.

It is not an unprimeable number, because it can be changed into a prime (28488637) 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, 138192 + ... + 138397.

It is an arithmetic number, because the mean of its divisors is an integer number (7191340).

Almost surely, 2^28488667 is an apocalyptic number.

28488667 is a deficient number, since it is larger than the sum of its proper divisors (276693).

28488667 is a wasteful number, since it uses less digits than its factorization.

28488667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276692.

The product of its digits is 1032192, while the sum is 49.

The square root of 28488667 is about 5337.4775877750. The cubic root of 28488667 is about 305.4152437780.

The spelling of 28488667 in words is "twenty-eight million, four hundred eighty-eight thousand, six hundred sixty-seven".