63500728 has 8 divisors (see below), whose sum is σ = 119063880. Its totient is φ = 31750360.

The previous prime is 63500719. The next prime is 63500743. The reversal of 63500728 is 82700536.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 63500728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3968788 + ... + 3968803.

It is an arithmetic number, because the mean of its divisors is an integer number (14882985).

Almost surely, 2^63500728 is an apocalyptic number.

It is an amenable number.

63500728 is a deficient number, since it is larger than the sum of its proper divisors (55563152).

63500728 is a wasteful number, since it uses less digits than its factorization.

63500728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7937597 (or 7937593 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 63500728 is about 7968.7344039063. The cubic root of 63500728 is about 398.9571334362.

The spelling of 63500728 in words is "sixty-three million, five hundred thousand, seven hundred twenty-eight".