42643648 has 28 divisors (see below), whose sum is σ = 85455760. Its totient is φ = 21111552.

The previous prime is 42643637. The next prime is 42643661. The reversal of 42643648 is 84634624.

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, 3358 + ... + 9826.

Almost surely, 2^42643648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42643648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42727880).

42643648 is an abundant number, since it is smaller than the sum of its proper divisors (42812112).

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

42643648 is a wasteful number, since it uses less digits than its factorization.

42643648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584 (or 6574 counting only the distinct ones).

The product of its digits is 110592, while the sum is 37.

The square root of 42643648 is about 6530.2104100863. The cubic root of 42643648 is about 349.3693350357.

The spelling of 42643648 in words is "forty-two million, six hundred forty-three thousand, six hundred forty-eight".