63949728 has 24 divisors (see below), whose sum is σ = 167868288. Its totient is φ = 21316544.

The previous prime is 63949703. The next prime is 63949741. The reversal of 63949728 is 82794936.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×63949728² = 8179135422547968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332976 + ... + 333167.

It is an arithmetic number, because the mean of its divisors is an integer number (6994512).

Almost surely, 2^63949728 is an apocalyptic number.

It is an amenable number.

63949728 is an abundant number, since it is smaller than the sum of its proper divisors (103918560).

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

63949728 is a wasteful number, since it uses less digits than its factorization.

63949728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666156 (or 666148 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 63949728 is about 7996.8573827473. The cubic root of 63949728 is about 399.8952392320.

The spelling of 63949728 in words is "sixty-three million, nine hundred forty-nine thousand, seven hundred twenty-eight".