43670385 has 24 divisors (see below), whose sum is σ = 82577664. Its totient is φ = 21173280.

The previous prime is 43670381. The next prime is 43670387. The reversal of 43670385 is 58307634.

It is a happy number.

It is not a de Polignac number, because 43670385 - 2² = 43670381 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (43670381) 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, 43617 + ... + 44606.

It is an arithmetic number, because the mean of its divisors is an integer number (3440736).

Almost surely, 2^43670385 is an apocalyptic number.

43670385 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43670385 is a deficient number, since it is larger than the sum of its proper divisors (38907279).

43670385 is a wasteful number, since it uses less digits than its factorization.

43670385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88245 (or 88242 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 43670385 is about 6608.3572088682. The cubic root of 43670385 is about 352.1510656039.

The spelling of 43670385 in words is "forty-three million, six hundred seventy thousand, three hundred eighty-five".