28872554 has 4 divisors (see below), whose sum is σ = 43308834. Its totient is φ = 14436276.

The previous prime is 28872553. The next prime is 28872587. The reversal of 28872554 is 45527882.

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

It can be written as a sum of positive squares in only one way, i.e., 22344529 + 6528025 = 4727^2 + 2555^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28872551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7218137 + ... + 7218140.

Almost surely, 2^28872554 is an apocalyptic number.

28872554 is a deficient number, since it is larger than the sum of its proper divisors (14436280).

28872554 is a wasteful number, since it uses less digits than its factorization.

28872554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14436279.

The product of its digits is 179200, while the sum is 41.

The square root of 28872554 is about 5373.3187137932. The cubic root of 28872554 is about 306.7809590266.

The spelling of 28872554 in words is "twenty-eight million, eight hundred seventy-two thousand, five hundred fifty-four".