43138280 has 32 divisors (see below), whose sum is σ = 97264800. Its totient is φ = 17219136.

The previous prime is 43138243. The next prime is 43138289. The reversal of 43138280 is 8283134.

It is a happy number.

It is a super-2 number, since 2×43138280² = 3721822402716800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43138289) 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, 26531 + ... + 28109.

It is an arithmetic number, because the mean of its divisors is an integer number (3039525).

Almost surely, 2^43138280 is an apocalyptic number.

43138280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43138280 is an abundant number, since it is smaller than the sum of its proper divisors (54126520).

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

43138280 is a wasteful number, since it uses less digits than its factorization.

43138280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273 (or 2269 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 43138280 is about 6567.9738123717. The cubic root of 43138280 is about 350.7149467436.

The spelling of 43138280 in words is "forty-three million, one hundred thirty-eight thousand, two hundred eighty".