63705628 has 12 divisors (see below), whose sum is σ = 127411312. Its totient is φ = 27302400.

The previous prime is 63705619. The next prime is 63705643. The reversal of 63705628 is 82650736.

63705628 is an admirable number.

It is a super-3 number, since 3×63705628³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1137573 + ... + 1137628.

Almost surely, 2^63705628 is an apocalyptic number.

It is an amenable number.

63705628 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

63705628 is a wasteful number, since it uses less digits than its factorization.

63705628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275212 (or 2275210 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 63705628 is about 7981.5805452304. The cubic root of 63705628 is about 399.3857823244.

The spelling of 63705628 in words is "sixty-three million, seven hundred five thousand, six hundred twenty-eight".