43491120 has 40 divisors (see below), whose sum is σ = 134823216. Its totient is φ = 11597568.

The previous prime is 43491073. The next prime is 43491131. The reversal of 43491120 is 2119434.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 90367 + ... + 90846.

Almost surely, 2^43491120 is an apocalyptic number.

43491120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43491120 is an abundant number, since it is smaller than the sum of its proper divisors (91332096).

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

43491120 is a wasteful number, since it uses less digits than its factorization.

43491120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181229 (or 181223 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 43491120 is about 6594.7797537143. The cubic root of 43491120 is about 351.6685499127.

The spelling of 43491120 in words is "forty-three million, four hundred ninety-one thousand, one hundred twenty".