63401284 has 6 divisors (see below), whose sum is σ = 110952254. Its totient is φ = 31700640.

The previous prime is 63401257. The next prime is 63401287. The reversal of 63401284 is 48210436.

It can be written as a sum of positive squares in only one way, i.e., 62252100 + 1149184 = 7890^2 + 1072^2 .

It is a super-4 number, since 4×63401284⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (63401287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7925157 + ... + 7925164.

Almost surely, 2^63401284 is an apocalyptic number.

It is an amenable number.

63401284 is a deficient number, since it is larger than the sum of its proper divisors (47550970).

63401284 is a wasteful number, since it uses less digits than its factorization.

63401284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15850325 (or 15850323 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 63401284 is about 7962.4923233872. The cubic root of 63401284 is about 398.7487651092.

The spelling of 63401284 in words is "sixty-three million, four hundred one thousand, two hundred eighty-four".