63861420 has 96 divisors (see below), whose sum is σ = 205406208. Its totient is φ = 14522112.

The previous prime is 63861419. The next prime is 63861431. The reversal of 63861420 is 2416836.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 160662 + ... + 161058.

It is an arithmetic number, because the mean of its divisors is an integer number (2139648).

Almost surely, 2^63861420 is an apocalyptic number.

63861420 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 63861420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102703104).

63861420 is an abundant number, since it is smaller than the sum of its proper divisors (141544788).

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

63861420 is a wasteful number, since it uses less digits than its factorization.

63861420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 63861420 is about 7991.3340563388. The cubic root of 63861420 is about 399.7110830344.

The spelling of 63861420 in words is "sixty-three million, eight hundred sixty-one thousand, four hundred twenty".