63698538 has 8 divisors (see below), whose sum is σ = 127397088. Its totient is φ = 21232844.

The previous prime is 63698429. The next prime is 63698539. The reversal of 63698538 is 83589636.

It is a sphenic number, since it is the product of 3 distinct primes.

63698538 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (63698539) 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 3 ways as a sum of consecutive naturals, for example, 5308206 + ... + 5308217.

It is an arithmetic number, because the mean of its divisors is an integer number (15924636).

Almost surely, 2^63698538 is an apocalyptic number.

63698538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

63698538 is a wasteful number, since it uses less digits than its factorization.

63698538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616428.

The product of its digits is 933120, while the sum is 48.

The square root of 63698538 is about 7981.1363852524. The cubic root of 63698538 is about 399.3709654741.

The spelling of 63698538 in words is "sixty-three million, six hundred ninety-eight thousand, five hundred thirty-eight".