43491048 has 48 divisors (see below), whose sum is σ = 110766240. Its totient is φ = 14230080.

The previous prime is 43491043. The next prime is 43491059. The reversal of 43491048 is 84019434.

It is a happy number.

It is a super-2 number, since 2×43491048² = 3782942512276608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43491043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89061 + ... + 89547.

It is an arithmetic number, because the mean of its divisors is an integer number (2307630).

Almost surely, 2^43491048 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 43491048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55383120).

43491048 is an abundant number, since it is smaller than the sum of its proper divisors (67275192).

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

43491048 is a wasteful number, since it uses less digits than its factorization.

43491048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 43491048 is about 6594.7742948489. The cubic root of 43491048 is about 351.6683558489.

The spelling of 43491048 in words is "forty-three million, four hundred ninety-one thousand, forty-eight".