440146989 has 24 divisors (see below), whose sum is σ = 670155200. Its totient is φ = 277603200.

The previous prime is 440146969. The next prime is 440147023. The reversal of 440146989 is 989641044.

It is not a de Polignac number, because 440146989 - 2⁵ = 440146957 is a prime.

It is a super-2 number, since 2×440146989² = 387458743851532242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440146939) 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, 171264 + ... + 173814.

Almost surely, 2^440146989 is an apocalyptic number.

It is an amenable number.

440146989 is a deficient number, since it is larger than the sum of its proper divisors (230008211).

440146989 is a wasteful number, since it uses less digits than its factorization.

440146989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585 (or 3582 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 440146989 is about 20979.6803836474. The cubic root of 440146989 is about 760.6751785074.

The spelling of 440146989 in words is "four hundred forty million, one hundred forty-six thousand, nine hundred eighty-nine".