63891000 has 192 divisors, whose sum is σ = 223891200. Its totient is φ = 16416000.

The previous prime is 63890963. The next prime is 63891017. The reversal of 63891000 is 19836.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 278886 + ... + 279114.

It is an arithmetic number, because the mean of its divisors is an integer number (1166100).

Almost surely, 2^63891000 is an apocalyptic number.

63891000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63891000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111945600).

63891000 is an abundant number, since it is smaller than the sum of its proper divisors (160000200).

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

63891000 is a wasteful number, since it uses less digits than its factorization.

63891000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 63891000 is about 7993.1845968925. The cubic root of 63891000 is about 399.7727876274.

The spelling of 63891000 in words is "sixty-three million, eight hundred ninety-one thousand".