43972278 has 16 divisors (see below), whose sum is σ = 100508160. Its totient is φ = 12563496.

The previous prime is 43972261. The next prime is 43972283. The reversal of 43972278 is 87227934.

It is a super-2 number, since 2×43972278² = 3867122465018568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1046959 = 43972278 / (4 + 3 + 9 + 7 + 2 + 2 + 7 + 8).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523438 + ... + 523521.

It is an arithmetic number, because the mean of its divisors is an integer number (6281760).

Almost surely, 2^43972278 is an apocalyptic number.

43972278 is an abundant number, since it is smaller than the sum of its proper divisors (56535882).

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

43972278 is a wasteful number, since it uses less digits than its factorization.

43972278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046971.

The product of its digits is 169344, while the sum is 42.

The square root of 43972278 is about 6631.1596270939. The cubic root of 43972278 is about 352.9606752920.

The spelling of 43972278 in words is "forty-three million, nine hundred seventy-two thousand, two hundred seventy-eight".