63891344 has 20 divisors (see below), whose sum is σ = 135043440. Its totient is φ = 29041440.

The previous prime is 63891343. The next prime is 63891367. The reversal of 63891344 is 44319836.

It is a super-3 number, since 3×63891344³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63891298 and 63891307.

It is not an unprimeable number, because it can be changed into a prime (63891343) 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, 181334 + ... + 181685.

It is an arithmetic number, because the mean of its divisors is an integer number (6752172).

Almost surely, 2^63891344 is an apocalyptic number.

It is an amenable number.

63891344 is an abundant number, since it is smaller than the sum of its proper divisors (71152096).

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

63891344 is a wasteful number, since it uses less digits than its factorization.

63891344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363038 (or 363032 counting only the distinct ones).

The product of its digits is 62208, while the sum is 38.

The square root of 63891344 is about 7993.2061151956. The cubic root of 63891344 is about 399.7735051077.

The spelling of 63891344 in words is "sixty-three million, eight hundred ninety-one thousand, three hundred forty-four".