43139466 has 20 divisors (see below), whose sum is σ = 96664722. Its totient is φ = 14379768.

The previous prime is 43139461. The next prime is 43139497. The reversal of 43139466 is 66493134.

It can be written as a sum of positive squares in only one way, i.e., 41873841 + 1265625 = 6471^2 + 1125^2 .

It is a super-2 number, since 2×43139466² = 3722027053530312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43139466.

It is not an unprimeable number, because it can be changed into a prime (43139461) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 132985 + ... + 133308.

Almost surely, 2^43139466 is an apocalyptic number.

43139466 is an abundant number, since it is smaller than the sum of its proper divisors (53525256).

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

43139466 is a wasteful number, since it uses less digits than its factorization.

43139466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266307 (or 266298 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 43139466 is about 6568.0640983474. The cubic root of 43139466 is about 350.7181607808.

The spelling of 43139466 in words is "forty-three million, one hundred thirty-nine thousand, four hundred sixty-six".