63533808 has 140 divisors (see below), whose sum is σ = 199232040. Its totient is φ = 19502208.

The previous prime is 63533791. The next prime is 63533831. The reversal of 63533808 is 80833536.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 151423 + ... + 151841.

It is an arithmetic number, because the mean of its divisors is an integer number (1423086).

Almost surely, 2^63533808 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 63533808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99616020).

63533808 is an abundant number, since it is smaller than the sum of its proper divisors (135698232).

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

63533808 is a wasteful number, since it uses less digits than its factorization.

63533808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 63533808 is about 7970.8097455654. The cubic root of 63533808 is about 399.0263988413.

It can be divided in two parts, 635 and 33808, that added together give a palindrome (34443).

The spelling of 63533808 in words is "sixty-three million, five hundred thirty-three thousand, eight hundred eight".