43478287 has 4 divisors (see below), whose sum is σ = 43633296. Its totient is φ = 43323280.

The previous prime is 43478269. The next prime is 43478291. The reversal of 43478287 is 78287434.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43478287 - 2⁷ = 43478159 is a prime.

It is a super-2 number, since 2×43478287² = 3780722880908738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43478297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77083 + ... + 77644.

It is an arithmetic number, because the mean of its divisors is an integer number (10908324).

Almost surely, 2^43478287 is an apocalyptic number.

43478287 is a deficient number, since it is larger than the sum of its proper divisors (155009).

43478287 is a wasteful number, since it uses less digits than its factorization.

43478287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155008.

The product of its digits is 301056, while the sum is 43.

The square root of 43478287 is about 6593.8067153959. The cubic root of 43478287 is about 351.6339573609.

The spelling of 43478287 in words is "forty-three million, four hundred seventy-eight thousand, two hundred eighty-seven".