63654140 has 48 divisors (see below), whose sum is σ = 149403744. Its totient is φ = 22579200.

The previous prime is 63654119. The next prime is 63654163. The reversal of 63654140 is 4145636.

It is a happy number.

It is a congruent number.

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, 5492 + ... + 12548.

It is an arithmetic number, because the mean of its divisors is an integer number (3112578).

Almost surely, 2^63654140 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 63654140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74701872).

63654140 is an abundant number, since it is smaller than the sum of its proper divisors (85749604).

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

63654140 is a wasteful number, since it uses less digits than its factorization.

63654140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7118 (or 7116 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 63654140 is about 7978.3544669311. The cubic root of 63654140 is about 399.2781564717.

Adding to 63654140 its reverse (4145636), we get a palindrome (67799776).

The spelling of 63654140 in words is "sixty-three million, six hundred fifty-four thousand, one hundred forty".