63843540 has 24 divisors (see below), whose sum is σ = 178762080. Its totient is φ = 17024928.

The previous prime is 63843509. The next prime is 63843541. The reversal of 63843540 is 4534836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63843541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531970 + ... + 532089.

It is an arithmetic number, because the mean of its divisors is an integer number (7448420).

Almost surely, 2^63843540 is an apocalyptic number.

63843540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63843540 is an abundant number, since it is smaller than the sum of its proper divisors (114918540).

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

63843540 is a wasteful number, since it uses less digits than its factorization.

63843540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064071 (or 1064069 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 63843540 is about 7990.2152661865. The cubic root of 63843540 is about 399.6737756832.

The spelling of 63843540 in words is "sixty-three million, eight hundred forty-three thousand, five hundred forty".