43138378 has 8 divisors (see below), whose sum is σ = 64818468. Its totient is φ = 21532224.

The previous prime is 43138373. The next prime is 43138397. The reversal of 43138378 is 87383134.

It can be written as a sum of positive squares in 2 ways, for example, as 42211009 + 927369 = 6497^2 + 963^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (43138373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17001 + ... + 19372.

Almost surely, 2^43138378 is an apocalyptic number.

43138378 is a deficient number, since it is larger than the sum of its proper divisors (21680090).

43138378 is a wasteful number, since it uses less digits than its factorization.

43138378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36968.

The product of its digits is 48384, while the sum is 37.

The square root of 43138378 is about 6567.9812728113. The cubic root of 43138378 is about 350.7152123239.

It can be divided in two parts, 431 and 38378, that added together give a square (38809 = 197²).

The spelling of 43138378 in words is "forty-three million, one hundred thirty-eight thousand, three hundred seventy-eight".