28340554 has 16 divisors (see below), whose sum is σ = 48392640. Its totient is φ = 12321760.

The previous prime is 28340549. The next prime is 28340561. The reversal of 28340554 is 45504382.

It is a super-4 number, since 4×28340554⁴ (a number of 31 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27499 + ... + 28510.

It is an arithmetic number, because the mean of its divisors is an integer number (3024540).

Almost surely, 2^28340554 is an apocalyptic number.

28340554 is a deficient number, since it is larger than the sum of its proper divisors (20052086).

28340554 is a wasteful number, since it uses less digits than its factorization.

28340554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56045.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 28340554 is about 5323.5846945456. The cubic root of 28340554 is about 304.8850377446.

The spelling of 28340554 in words is "twenty-eight million, three hundred forty thousand, five hundred fifty-four".