43139404 has 108 divisors (see below), whose sum is σ = 103162248. Its totient is φ = 15671040.

The previous prime is 43139399. The next prime is 43139407. The reversal of 43139404 is 40493134.

It is a super-2 number, since 2×43139404² = 3722016354950432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (43139407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 403119 + ... + 403225.

It is an arithmetic number, because the mean of its divisors is an integer number (955206).

Almost surely, 2^43139404 is an apocalyptic number.

43139404 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43139404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51581124).

43139404 is an abundant number, since it is smaller than the sum of its proper divisors (60022844).

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

43139404 is a wasteful number, since it uses less digits than its factorization.

43139404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 43139404 is about 6568.0593785379. The cubic root of 43139404 is about 350.7179927635.

The spelling of 43139404 in words is "forty-three million, one hundred thirty-nine thousand, four hundred four".