463618644 has 12 divisors (see below), whose sum is σ = 1081776864. Its totient is φ = 154539544.

The previous prime is 463618633. The next prime is 463618657. The reversal of 463618644 is 446816364.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 463618596 and 463618605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19317432 + ... + 19317455.

It is an arithmetic number, because the mean of its divisors is an integer number (90148072).

Almost surely, 2^463618644 is an apocalyptic number.

It is an amenable number.

463618644 is an abundant number, since it is smaller than the sum of its proper divisors (618158220).

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

463618644 is a wasteful number, since it uses less digits than its factorization.

463618644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38634894 (or 38634892 counting only the distinct ones).

The product of its digits is 331776, while the sum is 42.

The square root of 463618644 is about 21531.8054050282. The cubic root of 463618644 is about 773.9631748733.

The spelling of 463618644 in words is "four hundred sixty-three million, six hundred eighteen thousand, six hundred forty-four".