63955628 has 12 divisors (see below), whose sum is σ = 122097192. Its totient is φ = 29070720.

The previous prime is 63955621. The next prime is 63955631. The reversal of 63955628 is 82655936.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 1453537 = 63955628 / (6 + 3 + 9 + 5 + 5 + 6 + 2 + 8).

It is not an unprimeable number, because it can be changed into a prime (63955621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726725 + ... + 726812.

It is an arithmetic number, because the mean of its divisors is an integer number (10174766).

Almost surely, 2^63955628 is an apocalyptic number.

It is an amenable number.

63955628 is a deficient number, since it is larger than the sum of its proper divisors (58141564).

63955628 is a wasteful number, since it uses less digits than its factorization.

63955628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453552 (or 1453550 counting only the distinct ones).

The product of its digits is 388800, while the sum is 44.

The square root of 63955628 is about 7997.2262691511. The cubic root of 63955628 is about 399.9075369614.

The spelling of 63955628 in words is "sixty-three million, nine hundred fifty-five thousand, six hundred twenty-eight".