63709404 has 144 divisors (see below), whose sum is σ = 180986400. Its totient is φ = 17346560.

The previous prime is 63709397. The next prime is 63709409. The reversal of 63709404 is 40490736.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63709409) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 715792 + ... + 715880.

It is an arithmetic number, because the mean of its divisors is an integer number (1256850).

Almost surely, 2^63709404 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 63709404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90493200).

63709404 is an abundant number, since it is smaller than the sum of its proper divisors (117276996).

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

63709404 is a wasteful number, since it uses less digits than its factorization.

63709404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 63709404 is about 7981.8170863532. The cubic root of 63709404 is about 399.3936730501.

The spelling of 63709404 in words is "sixty-three million, seven hundred nine thousand, four hundred four".