63950728 has 8 divisors (see below), whose sum is σ = 119907630. Its totient is φ = 31975360.

The previous prime is 63950717. The next prime is 63950729. The reversal of 63950728 is 82705936.

It can be written as a sum of positive squares in only one way, i.e., 57790404 + 6160324 = 7602^2 + 2482^2 .

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

It is a super-2 number, since 2×63950728² = 8179391223459968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63950729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3996913 + ... + 3996928.

Almost surely, 2^63950728 is an apocalyptic number.

It is an amenable number.

63950728 is a deficient number, since it is larger than the sum of its proper divisors (55956902).

63950728 is a wasteful number, since it uses less digits than its factorization.

63950728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7993847 (or 7993843 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 63950728 is about 7996.9199070642. The cubic root of 63950728 is about 399.8973236462.

The spelling of 63950728 in words is "sixty-three million, nine hundred fifty thousand, seven hundred twenty-eight".