28216054 has 4 divisors (see below), whose sum is σ = 42324084. Its totient is φ = 14108026.

The previous prime is 28216049. The next prime is 28216079. The reversal of 28216054 is 45061282.

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

It is a super-2 number, since 2×28216054² = 1592291406661832, which contains 22 as substring.

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, 7054012 + ... + 7054015.

It is an arithmetic number, because the mean of its divisors is an integer number (10581021).

Almost surely, 2^28216054 is an apocalyptic number.

28216054 is a deficient number, since it is larger than the sum of its proper divisors (14108030).

28216054 is a wasteful number, since it uses less digits than its factorization.

28216054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14108029.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28216054 is about 5311.8785754194. The cubic root of 28216054 is about 304.4379292576.

The spelling of 28216054 in words is "twenty-eight million, two hundred sixteen thousand, fifty-four".