43870 has 16 divisors (see below), whose sum is σ = 81648. Its totient is φ = 16960.

The previous prime is 43867. The next prime is 43889. The reversal of 43870 is 7834.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357 + ... + 463.

It is an arithmetic number, because the mean of its divisors is an integer number (5103).

2⁴³⁸⁷⁰ is an apocalyptic number.

43870 is a deficient number, since it is larger than the sum of its proper divisors (37778).

43870 is a wasteful number, since it uses less digits than its factorization.

43870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 43870 is about 209.4516650686. The cubic root of 43870 is about 35.2686804731.

The spelling of 43870 in words is "forty-three thousand, eight hundred seventy".