43668240 has 320 divisors, whose sum is σ = 179988480. Its totient is φ = 8478720.

The previous prime is 43668211. The next prime is 43668271. The reversal of 43668240 is 4286634.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 314091 + ... + 314229.

It is an arithmetic number, because the mean of its divisors is an integer number (562464).

Almost surely, 2^43668240 is an apocalyptic number.

43668240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43668240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89994240).

43668240 is an abundant number, since it is smaller than the sum of its proper divisors (136320240).

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

43668240 is a wasteful number, since it uses less digits than its factorization.

43668240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 43668240 is about 6608.1949123796. The cubic root of 43668240 is about 352.1452998628.

The spelling of 43668240 in words is "forty-three million, six hundred sixty-eight thousand, two hundred forty".