43870438 has 16 divisors (see below), whose sum is σ = 70562880. Its totient is φ = 20382336.

The previous prime is 43870433. The next prime is 43870441. The reversal of 43870438 is 83407834.

It is a junction number, because it is equal to n+sod(n) for n = 43870397 and 43870406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43870433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5481 + ... + 10852.

It is an arithmetic number, because the mean of its divisors is an integer number (4410180).

Almost surely, 2^43870438 is an apocalyptic number.

43870438 is a deficient number, since it is larger than the sum of its proper divisors (26692442).

43870438 is a wasteful number, since it uses less digits than its factorization.

43870438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16431.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 43870438 is about 6623.4762776053. The cubic root of 43870438 is about 352.6879784736.

It can be divided in two parts, 438 and 70438, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 43870438 in words is "forty-three million, eight hundred seventy thousand, four hundred thirty-eight".