63990822 has 128 divisors (see below), whose sum is σ = 167961600. Its totient is φ = 15814656.

The previous prime is 63990821. The next prime is 63990827. The reversal of 63990822 is 22809936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63990821) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 718954 + ... + 719042.

It is an arithmetic number, because the mean of its divisors is an integer number (1312200).

Almost surely, 2^63990822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63990822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83980800).

63990822 is an abundant number, since it is smaller than the sum of its proper divisors (103970778).

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

63990822 is a wasteful number, since it uses less digits than its factorization.

63990822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 63990822 is about 7999.4263544332. The cubic root of 63990822 is about 399.9808782526.

It can be divided in two parts, 6 and 3990822, that multiplied together give a palindrome (23944932).

The spelling of 63990822 in words is "sixty-three million, nine hundred ninety thousand, eight hundred twenty-two".