43974399 has 24 divisors (see below), whose sum is σ = 69271680. Its totient is φ = 24306480.

The previous prime is 43974391. The next prime is 43974407. The reversal of 43974399 is 99347934.

It is an interprime number because it is at equal distance from previous prime (43974391) and next prime (43974407).

It is not a de Polignac number, because 43974399 - 2³ = 43974391 is a prime.

It is a super-2 number, since 2×43974399² = 3867495534822402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43974391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19092 + ... + 21270.

It is an arithmetic number, because the mean of its divisors is an integer number (2886320).

Almost surely, 2^43974399 is an apocalyptic number.

43974399 is a deficient number, since it is larger than the sum of its proper divisors (25297281).

43974399 is a wasteful number, since it uses less digits than its factorization.

43974399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251 (or 2220 counting only the distinct ones).

The product of its digits is 734832, while the sum is 48.

The square root of 43974399 is about 6631.3195519444. The cubic root of 43974399 is about 352.9663502126.

The spelling of 43974399 in words is "forty-three million, nine hundred seventy-four thousand, three hundred ninety-nine".