63532820 has 24 divisors (see below), whose sum is σ = 143682504. Its totient is φ = 23458176.

The previous prime is 63532813. The next prime is 63532853. The reversal of 63532820 is 2823536.

It can be written as a sum of positive squares in 4 ways, for example, as 5071504 + 58461316 = 2252^2 + 7646^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121919 + ... + 122438.

It is an arithmetic number, because the mean of its divisors is an integer number (5986771).

Almost surely, 2^63532820 is an apocalyptic number.

It is an amenable number.

63532820 is an abundant number, since it is smaller than the sum of its proper divisors (80149684).

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

63532820 is a wasteful number, since it uses less digits than its factorization.

63532820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244379 (or 244377 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 63532820 is about 7970.7477691870. The cubic root of 63532820 is about 399.0243304405.

The spelling of 63532820 in words is "sixty-three million, five hundred thirty-two thousand, eight hundred twenty".