63816740 has 48 divisors (see below), whose sum is σ = 145786368. Its totient is φ = 23324544.

The previous prime is 63816719. The next prime is 63816751. The reversal of 63816740 is 4761836.

It is a self number, because there is not a number n which added to its sum of digits gives 63816740.

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, 25589 + ... + 27971.

It is an arithmetic number, because the mean of its divisors is an integer number (3037216).

Almost surely, 2^63816740 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 63816740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72893184).

63816740 is an abundant number, since it is smaller than the sum of its proper divisors (81969628).

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

63816740 is a wasteful number, since it uses less digits than its factorization.

63816740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508 (or 2506 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 63816740 is about 7988.5380389656. The cubic root of 63816740 is about 399.6178433403.

The spelling of 63816740 in words is "sixty-three million, eight hundred sixteen thousand, seven hundred forty".