63138894 has 64 divisors (see below), whose sum is σ = 156473856. Its totient is φ = 16539264.

The previous prime is 63138883. The next prime is 63138913. The reversal of 63138894 is 49883136.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107269 + ... + 107855.

It is an arithmetic number, because the mean of its divisors is an integer number (2444904).

Almost surely, 2^63138894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63138894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78236928).

63138894 is an abundant number, since it is smaller than the sum of its proper divisors (93334962).

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

63138894 is a wasteful number, since it uses less digits than its factorization.

63138894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809.

The product of its digits is 124416, while the sum is 42.

The square root of 63138894 is about 7945.9986156556. The cubic root of 63138894 is about 398.1979226519.

The spelling of 63138894 in words is "sixty-three million, one hundred thirty-eight thousand, eight hundred ninety-four".