43790538 has 64 divisors (see below), whose sum is σ = 104509440. Its totient is φ = 12076800.

The previous prime is 43790531. The next prime is 43790557. The reversal of 43790538 is 83509734.

It is a super-2 number, since 2×43790538² = 3835222436658888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43790496 and 43790505.

It is not an unprimeable number, because it can be changed into a prime (43790531) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 34153 + ... + 35411.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^43790538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43790538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52254720).

43790538 is an abundant number, since it is smaller than the sum of its proper divisors (60718902).

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

43790538 is a wasteful number, since it uses less digits than its factorization.

43790538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 43790538 is about 6617.4419528999. The cubic root of 43790538 is about 352.4737347766.

The spelling of 43790538 in words is "forty-three million, seven hundred ninety thousand, five hundred thirty-eight".