63909420 has 96 divisors (see below), whose sum is σ = 184396800. Its totient is φ = 16533504.

The previous prime is 63909413. The next prime is 63909421. The reversal of 63909420 is 2490936.

It is not an unprimeable number, because it can be changed into a prime (63909421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459711 + ... + 459849.

It is an arithmetic number, because the mean of its divisors is an integer number (1920800).

Almost surely, 2^63909420 is an apocalyptic number.

63909420 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 63909420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92198400).

63909420 is an abundant number, since it is smaller than the sum of its proper divisors (120487380).

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

63909420 is a wasteful number, since it uses less digits than its factorization.

63909420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 63909420 is about 7994.3367454718. The cubic root of 63909420 is about 399.8112025695.

The spelling of 63909420 in words is "sixty-three million, nine hundred nine thousand, four hundred twenty".