654321798 has 48 divisors (see below), whose sum is σ = 1562280720. Its totient is φ = 196644672.

The previous prime is 654321749. The next prime is 654321803. The reversal of 654321798 is 897123456.

654321798 is a `hidden beast` number, since 6 + 543 + 2 + 17 + 98 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22453 + ... + 42576.

It is an arithmetic number, because the mean of its divisors is an integer number (32547515).

Almost surely, 2^654321798 is an apocalyptic number.

654321798 is an abundant number, since it is smaller than the sum of its proper divisors (907958922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

654321798 is a wasteful number, since it uses less digits than its factorization.

654321798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65093 (or 65090 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 654321798 is about 25579.7145801121. The cubic root of 654321798 is about 868.1547175132.

The spelling of 654321798 in words is "six hundred fifty-four million, three hundred twenty-one thousand, seven hundred ninety-eight".