63440216 has 16 divisors (see below), whose sum is σ = 135943440. Its totient is φ = 27188640.

The previous prime is 63440207. The next prime is 63440219. The reversal of 63440216 is 61204436.

It is a super-2 number, since 2×63440216² = 8049322012253312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63440219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566375 + ... + 566486.

It is an arithmetic number, because the mean of its divisors is an integer number (8496465).

Almost surely, 2^63440216 is an apocalyptic number.

It is an amenable number.

63440216 is an abundant number, since it is smaller than the sum of its proper divisors (72503224).

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

63440216 is a wasteful number, since it uses less digits than its factorization.

63440216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132874 (or 1132870 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 63440216 is about 7964.9366601374. The cubic root of 63440216 is about 398.8303665609.

The spelling of 63440216 in words is "sixty-three million, four hundred forty thousand, two hundred sixteen".