63401256 has 24 divisors (see below), whose sum is σ = 171711930. Its totient is φ = 21133728.

The previous prime is 63401243. The next prime is 63401257. The reversal of 63401256 is 65210436.

63401256 is a `hidden beast` number, since 6 + 3 + 401 + 256 = 666.

It can be written as a sum of positive squares in only one way, i.e., 33524100 + 29877156 = 5790^2 + 5466^2 .

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

It is not an unprimeable number, because it can be changed into a prime (63401257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 440215 + ... + 440358.

Almost surely, 2^63401256 is an apocalyptic number.

It is an amenable number.

63401256 is an abundant number, since it is smaller than the sum of its proper divisors (108310674).

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

63401256 is a wasteful number, since it uses less digits than its factorization.

63401256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880585 (or 880578 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 63401256 is about 7962.4905651435. The cubic root of 63401256 is about 398.7487064092.

The spelling of 63401256 in words is "sixty-three million, four hundred one thousand, two hundred fifty-six".