63406220 has 12 divisors (see below), whose sum is σ = 133153104. Its totient is φ = 25362480.

The previous prime is 63406219. The next prime is 63406247. The reversal of 63406220 is 2260436.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1585136 + ... + 1585175.

It is an arithmetic number, because the mean of its divisors is an integer number (11096092).

Almost surely, 2^63406220 is an apocalyptic number.

It is an amenable number.

63406220 is an abundant number, since it is smaller than the sum of its proper divisors (69746884).

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

63406220 is a wasteful number, since it uses less digits than its factorization.

63406220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170320 (or 3170318 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 63406220 is about 7962.8022705578. The cubic root of 63406220 is about 398.7591128115.

Adding to 63406220 its reverse (2260436), we get a palindrome (65666656).

The spelling of 63406220 in words is "sixty-three million, four hundred six thousand, two hundred twenty".