43281648 has 40 divisors (see below), whose sum is σ = 124235600. Its totient is φ = 14427072.

The previous prime is 43281617. The next prime is 43281649. The reversal of 43281648 is 84618234.

43281648 is a `hidden beast` number, since 4 + 3 + 2 + 8 + 1 + 648 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43281649) 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, 49663 + ... + 50526.

It is an arithmetic number, because the mean of its divisors is an integer number (3105890).

Almost surely, 2^43281648 is an apocalyptic number.

43281648 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

43281648 is an abundant number, since it is smaller than the sum of its proper divisors (80953952).

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

43281648 is a wasteful number, since it uses less digits than its factorization.

43281648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100206 (or 100194 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 43281648 is about 6578.8789318546. The cubic root of 43281648 is about 351.1030452075.

The spelling of 43281648 in words is "forty-three million, two hundred eighty-one thousand, six hundred forty-eight".