43520490 has 80 divisors (see below), whose sum is σ = 126053928. Its totient is φ = 10710144.

The previous prime is 43520489. The next prime is 43520501. The reversal of 43520490 is 9402534.

It can be written as a sum of positive squares in 4 ways, for example, as 32251041 + 11269449 = 5679^2 + 3357^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8464 + ... + 12596.

Almost surely, 2^43520490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43520490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63026964).

43520490 is an abundant number, since it is smaller than the sum of its proper divisors (82533438).

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

43520490 is a wasteful number, since it uses less digits than its factorization.

43520490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4165 (or 4156 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 43520490 is about 6597.0061391513. The cubic root of 43520490 is about 351.7476938943.

The spelling of 43520490 in words is "forty-three million, five hundred twenty thousand, four hundred ninety".