63439040 has 112 divisors (see below), whose sum is σ = 174784512. Its totient is φ = 21482496.

The previous prime is 63439031. The next prime is 63439069. The reversal of 63439040 is 4093436.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×63439040² = 8049023592243200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63438994 and 63439012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284369 + ... + 284591.

It is an arithmetic number, because the mean of its divisors is an integer number (1560576).

Almost surely, 2^63439040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63439040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87392256).

63439040 is an abundant number, since it is smaller than the sum of its proper divisors (111345472).

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

63439040 is a wasteful number, since it uses less digits than its factorization.

63439040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 63439040 is about 7964.8628362326. The cubic root of 63439040 is about 398.8279021546.

The spelling of 63439040 in words is "sixty-three million, four hundred thirty-nine thousand, forty".