63917040 has 240 divisors, whose sum is σ = 227985408. Its totient is φ = 14784000.

The previous prime is 63917033. The next prime is 63917089. The reversal of 63917040 is 4071936.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 63916989 and 63917007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 900205 + ... + 900275.

Almost surely, 2^63917040 is an apocalyptic number.

63917040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63917040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113992704).

63917040 is an abundant number, since it is smaller than the sum of its proper divisors (164068368).

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

63917040 is a wasteful number, since it uses less digits than its factorization.

63917040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 63917040 is about 7994.8133186460. The cubic root of 63917040 is about 399.8270919344.

Adding to 63917040 its reverse (4071936), we get a palindrome (67988976).

It can be divided in two parts, 6391 and 7040, that added together give a palindrome (13431).

The spelling of 63917040 in words is "sixty-three million, nine hundred seventeen thousand, forty".