646454798 has 8 divisors (see below), whose sum is σ = 1057835160. Its totient is φ = 293843080.

The previous prime is 646454797. The next prime is 646454821. The reversal of 646454798 is 897454646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646454797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14692133 + ... + 14692176.

It is an arithmetic number, because the mean of its divisors is an integer number (132229395).

Almost surely, 2^646454798 is an apocalyptic number.

646454798 is a deficient number, since it is larger than the sum of its proper divisors (411380362).

646454798 is a wasteful number, since it uses less digits than its factorization.

646454798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29384322.

The product of its digits is 5806080, while the sum is 53.

The square root of 646454798 is about 25425.4753741203. The cubic root of 646454798 is about 864.6613654366.

The spelling of 646454798 in words is "six hundred forty-six million, four hundred fifty-four thousand, seven hundred ninety-eight".