63920826 has 60 divisors (see below), whose sum is σ = 151303482. Its totient is φ = 20167056.

The previous prime is 63920821. The next prime is 63920827. The reversal of 63920826 is 62802936.

It can be written as a sum of positive squares in only one way, i.e., 35820225 + 28100601 = 5985^2 + 5301^2 .

It is not an unprimeable number, because it can be changed into a prime (63920821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 57936 + ... + 59028.

Almost surely, 2^63920826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63920826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75651741).

63920826 is an abundant number, since it is smaller than the sum of its proper divisors (87382656).

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

63920826 is a wasteful number, since it uses less digits than its factorization.

63920826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 63920826 is about 7995.0500936517. The cubic root of 63920826 is about 399.8349861021.

It can be divided in two parts, 63920 and 826, that added together give a palindrome (64746).

The spelling of 63920826 in words is "sixty-three million, nine hundred twenty thousand, eight hundred twenty-six".