43987000 has 32 divisors (see below), whose sum is σ = 102931920. Its totient is φ = 17594400.

The previous prime is 43986991. The next prime is 43987003. The reversal of 43987000 is 78934.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43987003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20994 + ... + 22993.

Almost surely, 2^43987000 is an apocalyptic number.

43987000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43987000 is an abundant number, since it is smaller than the sum of its proper divisors (58944920).

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

43987000 is a wasteful number, since it uses less digits than its factorization.

43987000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44008 (or 43994 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 43987000 is about 6632.2695964504. The cubic root of 43987000 is about 353.0000615258. Note that the first 4 decimals are identical.

The spelling of 43987000 in words is "forty-three million, nine hundred eighty-seven thousand".