40331989 has 4 divisors (see below), whose sum is σ = 40884556. Its totient is φ = 39779424.

The previous prime is 40331983. The next prime is 40331999. The reversal of 40331989 is 98913304.

40331989 = 707² + 708² + ... + 779².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13727025 + 26604964 = 3705^2 + 5158^2 .

It is a cyclic number.

It is not a de Polignac number, because 40331989 - 2³ = 40331981 is a prime.

It is a super-2 number, since 2×40331989² = 3253338673392242, 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 (40331981) 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, 276174 + ... + 276319.

It is an arithmetic number, because the mean of its divisors is an integer number (10221139).

Almost surely, 2^40331989 is an apocalyptic number.

It is an amenable number.

40331989 is a deficient number, since it is larger than the sum of its proper divisors (552567).

40331989 is an equidigital number, since it uses as much as digits as its factorization.

40331989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552566.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 40331989 is about 6350.7471214023. The cubic root of 40331989 is about 342.9387390699.

The spelling of 40331989 in words is "forty million, three hundred thirty-one thousand, nine hundred eighty-nine".