63120640 has 72 divisors (see below), whose sum is σ = 164975328. Its totient is φ = 22947840.

The previous prime is 63120623. The next prime is 63120653. The reversal of 63120640 is 4602136.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11839 + ... + 16321.

It is an arithmetic number, because the mean of its divisors is an integer number (2291324).

Almost surely, 2^63120640 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 63120640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82487664).

63120640 is an abundant number, since it is smaller than the sum of its proper divisors (101854688).

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

63120640 is a wasteful number, since it uses less digits than its factorization.

63120640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4515 (or 4501 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 63120640 is about 7944.8499041832. The cubic root of 63120640 is about 398.1595447994.

Adding to 63120640 its reverse (4602136), we get a palindrome (67722776).

The spelling of 63120640 in words is "sixty-three million, one hundred twenty thousand, six hundred forty".