43770138 has 16 divisors (see below), whose sum is σ = 92689920. Its totient is φ = 13731776.

The previous prime is 43770131. The next prime is 43770157. The reversal of 43770138 is 83107734.

43770138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 43770099 and 43770108.

It is not an unprimeable number, because it can be changed into a prime (43770131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214458 + ... + 214661.

It is an arithmetic number, because the mean of its divisors is an integer number (5793120).

Almost surely, 2^43770138 is an apocalyptic number.

43770138 is an abundant number, since it is smaller than the sum of its proper divisors (48919782).

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

43770138 is a wasteful number, since it uses less digits than its factorization.

43770138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429141.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 43770138 is about 6615.9003922369. The cubic root of 43770138 is about 352.4189925014.

The spelling of 43770138 in words is "forty-three million, seven hundred seventy thousand, one hundred thirty-eight".