63945420 has 96 divisors (see below), whose sum is σ = 223243776. Its totient is φ = 13286400.

The previous prime is 63945391. The next prime is 63945433. The reversal of 63945420 is 2454936.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2301 + ... + 11540.

It is an arithmetic number, because the mean of its divisors is an integer number (2325456).

Almost surely, 2^63945420 is an apocalyptic number.

63945420 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 63945420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111621888).

63945420 is an abundant number, since it is smaller than the sum of its proper divisors (159298356).

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

63945420 is a wasteful number, since it uses less digits than its factorization.

63945420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13871 (or 13869 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 63945420 is about 7996.5880224006. The cubic root of 63945420 is about 399.8862593274.

The spelling of 63945420 in words is "sixty-three million, nine hundred forty-five thousand, four hundred twenty".