43990428 has 12 divisors (see below), whose sum is σ = 102644360. Its totient is φ = 14663472.

The previous prime is 43990423. The next prime is 43990451. The reversal of 43990428 is 82409934.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43990423) 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, 1832923 + ... + 1832946.

Almost surely, 2^43990428 is an apocalyptic number.

It is an amenable number.

43990428 is an abundant number, since it is smaller than the sum of its proper divisors (58653932).

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

43990428 is a wasteful number, since it uses less digits than its factorization.

43990428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665876 (or 3665874 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 43990428 is about 6632.5280248183. The cubic root of 43990428 is about 353.0092313015.

The spelling of 43990428 in words is "forty-three million, nine hundred ninety thousand, four hundred twenty-eight".