63440436 has 12 divisors (see below), whose sum is σ = 148027712. Its totient is φ = 21146808.

The previous prime is 63440401. The next prime is 63440471. The reversal of 63440436 is 63404436.

It is an interprime number because it is at equal distance from previous prime (63440401) and next prime (63440471).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 2643340 + ... + 2643363.

Almost surely, 2^63440436 is an apocalyptic number.

It is an amenable number.

63440436 is an abundant number, since it is smaller than the sum of its proper divisors (84587276).

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

63440436 is a wasteful number, since it uses less digits than its factorization.

63440436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286710 (or 5286708 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 63440436 is about 7964.9504706558. The cubic root of 63440436 is about 398.8308275860.

The spelling of 63440436 in words is "sixty-three million, four hundred forty thousand, four hundred thirty-six".