63906804 has 72 divisors (see below), whose sum is σ = 183150240. Its totient is φ = 18626112.

The previous prime is 63906803. The next prime is 63906847. The reversal of 63906804 is 40860936.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63906803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5299 + ... + 12485.

Almost surely, 2^63906804 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 63906804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91575120).

63906804 is an abundant number, since it is smaller than the sum of its proper divisors (119243436).

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

63906804 is a wasteful number, since it uses less digits than its factorization.

63906804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7229 (or 7224 counting only the distinct ones).

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

The square root of 63906804 is about 7994.1731279726. The cubic root of 63906804 is about 399.8057473467.

The spelling of 63906804 in words is "sixty-three million, nine hundred six thousand, eight hundred four".