646364460 has 48 divisors (see below), whose sum is σ = 2068367616. Its totient is φ = 147740352.

The previous prime is 646364443. The next prime is 646364473. The reversal of 646364460 is 64463646.

646364460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×646364460³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 769062 + ... + 769901.

It is an arithmetic number, because the mean of its divisors is an integer number (43090992).

Almost surely, 2^646364460 is an apocalyptic number.

646364460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

646364460 is an abundant number, since it is smaller than the sum of its proper divisors (1422003156).

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

646364460 is a wasteful number, since it uses less digits than its factorization.

646364460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538982 (or 1538980 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 39.

The square root of 646364460 is about 25423.6987867619. The cubic root of 646364460 is about 864.6210865610.

It can be divided in two parts, 64636 and 4460, that added together give a palindrome (69096).

The spelling of 646364460 in words is "six hundred forty-six million, three hundred sixty-four thousand, four hundred sixty".