63685404 has 36 divisors (see below), whose sum is σ = 161985096. Its totient is φ = 21096288.

The previous prime is 63685381. The next prime is 63685411. The reversal of 63685404 is 40458636.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 442 + ... + 11294.

It is an arithmetic number, because the mean of its divisors is an integer number (4499586).

Almost surely, 2^63685404 is an apocalyptic number.

It is an amenable number.

63685404 is an abundant number, since it is smaller than the sum of its proper divisors (98299692).

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

63685404 is a wasteful number, since it uses less digits than its factorization.

63685404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11026 (or 11021 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 63685404 is about 7980.3135276755. The cubic root of 63685404 is about 399.3435148241.

The spelling of 63685404 in words is "sixty-three million, six hundred eighty-five thousand, four hundred four".