28892551 has 4 divisors (see below), whose sum is σ = 28909432. Its totient is φ = 28875672.

The previous prime is 28892543. The next prime is 28892587. The reversal of 28892551 is 15529882.

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 28892551 - 2³ = 28892543 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 (28890551) 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, 5541 + ... + 9406.

It is an arithmetic number, because the mean of its divisors is an integer number (7227358).

Almost surely, 2^28892551 is an apocalyptic number.

28892551 is a deficient number, since it is larger than the sum of its proper divisors (16881).

28892551 is a wasteful number, since it uses less digits than its factorization.

28892551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16880.

The product of its digits is 57600, while the sum is 40.

The square root of 28892551 is about 5375.1791598048. The cubic root of 28892551 is about 306.8517677157.

The spelling of 28892551 in words is "twenty-eight million, eight hundred ninety-two thousand, five hundred fifty-one".