63840484 has 24 divisors (see below), whose sum is σ = 116739000. Its totient is φ = 30508800.

The previous prime is 63840473. The next prime is 63840499. The reversal of 63840484 is 48404836.

It can be written as a sum of positive squares in 4 ways, for example, as 13032100 + 50808384 = 3610^2 + 7128^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 8992 + ... + 14440.

It is an arithmetic number, because the mean of its divisors is an integer number (4864125).

Almost surely, 2^63840484 is an apocalyptic number.

It is an amenable number.

63840484 is a deficient number, since it is larger than the sum of its proper divisors (52898516).

63840484 is a wasteful number, since it uses less digits than its factorization.

63840484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5583 (or 5581 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 63840484 is about 7990.0240300014. The cubic root of 63840484 is about 399.6673985173.

The spelling of 63840484 in words is "sixty-three million, eight hundred forty thousand, four hundred eighty-four".