63712740 has 144 divisors (see below), whose sum is σ = 223618752. Its totient is φ = 13434624.

The previous prime is 63712717. The next prime is 63712741. The reversal of 63712740 is 4721736.

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 = 63712698 and 63712707.

It is not an unprimeable number, because it can be changed into a prime (63712741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37387 + ... + 39053.

It is an arithmetic number, because the mean of its divisors is an integer number (1552908).

Almost surely, 2^63712740 is an apocalyptic number.

63712740 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 63712740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111809376).

63712740 is an abundant number, since it is smaller than the sum of its proper divisors (159906012).

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

63712740 is a wasteful number, since it uses less digits than its factorization.

63712740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706 (or 1697 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 63712740 is about 7982.0260585894. The cubic root of 63712740 is about 399.4006440463.

The spelling of 63712740 in words is "sixty-three million, seven hundred twelve thousand, seven hundred forty".