43990407 has 24 divisors (see below), whose sum is σ = 67566096. Its totient is φ = 27484416.

The previous prime is 43990399. The next prime is 43990423. The reversal of 43990407 is 70409934.

It is not a de Polignac number, because 43990407 - 2³ = 43990399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43990487) 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, 48048 + ... + 48954.

It is an arithmetic number, because the mean of its divisors is an integer number (2815254).

Almost surely, 2^43990407 is an apocalyptic number.

43990407 is a deficient number, since it is larger than the sum of its proper divisors (23575689).

43990407 is a wasteful number, since it uses less digits than its factorization.

43990407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 43990407 is about 6632.5264417113. The cubic root of 43990407 is about 353.0091751287.

The spelling of 43990407 in words is "forty-three million, nine hundred ninety thousand, four hundred seven".