63403640 has 32 divisors (see below), whose sum is σ = 148862880. Its totient is φ = 24258432.

The previous prime is 63403621. The next prime is 63403651. The reversal of 63403640 is 4630436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33539 + ... + 35378.

It is an arithmetic number, because the mean of its divisors is an integer number (4651965).

Almost surely, 2^63403640 is an apocalyptic number.

It is an amenable number.

63403640 is an abundant number, since it is smaller than the sum of its proper divisors (85459240).

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

63403640 is a wasteful number, since it uses less digits than its factorization.

63403640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68951 (or 68947 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 63403640 is about 7962.6402656405. The cubic root of 63403640 is about 398.7537042334.

The spelling of 63403640 in words is "sixty-three million, four hundred three thousand, six hundred forty".