43490370 has 128 divisors (see below), whose sum is σ = 132544512. Its totient is φ = 8870400.

The previous prime is 43490353. The next prime is 43490371. The reversal of 43490370 is 7309434.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (43490371) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 154630 + ... + 154910.

It is an arithmetic number, because the mean of its divisors is an integer number (1035504).

Almost surely, 2^43490370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43490370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66272256).

43490370 is an abundant number, since it is smaller than the sum of its proper divisors (89054142).

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

43490370 is a wasteful number, since it uses less digits than its factorization.

43490370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 43490370 is about 6594.7228903116. The cubic root of 43490370 is about 351.6665284048. Note that the first 3 decimals are identical.

The spelling of 43490370 in words is "forty-three million, four hundred ninety thousand, three hundred seventy".