548661890 has 32 divisors (see below), whose sum is σ = 1129524480. Its totient is φ = 187971264.

The previous prime is 548661889. The next prime is 548661923. The reversal of 548661890 is 98166845.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140099 + ... + 143961.

It is an arithmetic number, because the mean of its divisors is an integer number (35297640).

Almost surely, 2^548661890 is an apocalyptic number.

548661890 is an abundant number, since it is smaller than the sum of its proper divisors (580862590).

548661890 is a wasteful number, since it uses less digits than its factorization.

548661890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5906.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 548661890 is about 23423.5328249178. The cubic root of 548661890 is about 818.6562813304.

It can be divided in two parts, 5486 and 61890, that added together give a palindrome (67376).

The spelling of 548661890 in words is "five hundred forty-eight million, six hundred sixty-one thousand, eight hundred ninety".