63306820 has 12 divisors (see below), whose sum is σ = 132944364. Its totient is φ = 25322720.

The previous prime is 63306809. The next prime is 63306851. The reversal of 63306820 is 2860336.

It can be written as a sum of positive squares in 2 ways, for example, as 45481536 + 17825284 = 6744^2 + 4222^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1582651 + ... + 1582690.

It is an arithmetic number, because the mean of its divisors is an integer number (11078697).

Almost surely, 2^63306820 is an apocalyptic number.

It is an amenable number.

63306820 is an abundant number, since it is smaller than the sum of its proper divisors (69637544).

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

63306820 is a wasteful number, since it uses less digits than its factorization.

63306820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165350 (or 3165348 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 63306820 is about 7956.5583011752. The cubic root of 63306820 is about 398.5506296571.

The spelling of 63306820 in words is "sixty-three million, three hundred six thousand, eight hundred twenty".