28040554 has 16 divisors (see below), whose sum is σ = 43948800. Its totient is φ = 13402080.

The previous prime is 28040533. The next prime is 28040569. The reversal of 28040554 is 45504082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2422 + ... + 7870.

It is an arithmetic number, because the mean of its divisors is an integer number (2746800).

Almost surely, 2^28040554 is an apocalyptic number.

28040554 is a deficient number, since it is larger than the sum of its proper divisors (15908246).

28040554 is a wasteful number, since it uses less digits than its factorization.

28040554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 28040554 is about 5295.3332284192. Note that the first 3 decimals coincide. The cubic root of 28040554 is about 303.8054286446.

The spelling of 28040554 in words is "twenty-eight million, forty thousand, five hundred fifty-four".