43491132 has 72 divisors (see below), whose sum is σ = 114362976. Its totient is φ = 13924224.

The previous prime is 43491131. The next prime is 43491143. The reversal of 43491132 is 23119434.

43491132 is a `hidden beast` number, since 43 + 491 + 132 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 43491096 and 43491105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43491131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137038 + ... + 137354.

Almost surely, 2^43491132 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 43491132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57181488).

43491132 is an abundant number, since it is smaller than the sum of its proper divisors (70871844).

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

43491132 is a wasteful number, since it uses less digits than its factorization.

43491132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 462 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 43491132 is about 6594.7806635248. The cubic root of 43491132 is about 351.6685822566.

The spelling of 43491132 in words is "forty-three million, four hundred ninety-one thousand, one hundred thirty-two".