63261240 has 128 divisors (see below), whose sum is σ = 218972160. Its totient is φ = 14321664.

The previous prime is 63261239. The next prime is 63261283. The reversal of 63261240 is 4216236.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 63261240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106384 + ... + 106976.

It is an arithmetic number, because the mean of its divisors is an integer number (1710720).

Almost surely, 2^63261240 is an apocalyptic number.

63261240 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 63261240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109486080).

63261240 is an abundant number, since it is smaller than the sum of its proper divisors (155710920).

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

63261240 is a wasteful number, since it uses less digits than its factorization.

63261240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 63261240 is about 7953.6934816474. The cubic root of 63261240 is about 398.4549564516.

Adding to 63261240 its reverse (4216236), we get a palindrome (67477476).

The spelling of 63261240 in words is "sixty-three million, two hundred sixty-one thousand, two hundred forty".