43791864 has 64 divisors (see below), whose sum is σ = 116756640. Its totient is φ = 13639680.

The previous prime is 43791863. The next prime is 43791889. The reversal of 43791864 is 46819734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43791863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73552 + ... + 74144.

Almost surely, 2^43791864 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 43791864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58378320).

43791864 is an abundant number, since it is smaller than the sum of its proper divisors (72964776).

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

43791864 is a wasteful number, since it uses less digits than its factorization.

43791864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 796 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 43791864 is about 6617.5421419134. The cubic root of 43791864 is about 352.4772924359.

The spelling of 43791864 in words is "forty-three million, seven hundred ninety-one thousand, eight hundred sixty-four".