43997668 has 24 divisors (see below), whose sum is σ = 90457920. Its totient is φ = 18460320.

The previous prime is 43997659. The next prime is 43997671. The reversal of 43997668 is 86679934.

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 37888 + ... + 39031.

It is an arithmetic number, because the mean of its divisors is an integer number (3769080).

Almost surely, 2^43997668 is an apocalyptic number.

It is an amenable number.

43997668 is an abundant number, since it is smaller than the sum of its proper divisors (46460252).

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

43997668 is a wasteful number, since it uses less digits than its factorization.

43997668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76947 (or 76945 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 52.

The square root of 43997668 is about 6633.0737972677. The cubic root of 43997668 is about 353.0285964737.

It can be divided in two parts, 439976 and 68, that added together give a palindrome (440044).

The spelling of 43997668 in words is "forty-three million, nine hundred ninety-seven thousand, six hundred sixty-eight".