43390740 has 48 divisors (see below), whose sum is σ = 122971968. Its totient is φ = 11430144.

The previous prime is 43390733. The next prime is 43390759. The reversal of 43390740 is 4709334.

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

It is a junction number, because it is equal to n+sod(n) for n = 43390698 and 43390707.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 624 + ... + 9336.

It is an arithmetic number, because the mean of its divisors is an integer number (2561916).

Almost surely, 2^43390740 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 43390740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61485984).

43390740 is an abundant number, since it is smaller than the sum of its proper divisors (79581228).

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

43390740 is a wasteful number, since it uses less digits than its factorization.

43390740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8808 (or 8806 counting only the distinct ones).

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

The square root of 43390740 is about 6587.1647922304. The cubic root of 43390740 is about 351.3977844289.

The spelling of 43390740 in words is "forty-three million, three hundred ninety thousand, seven hundred forty".