40643589 has 12 divisors (see below), whose sum is σ = 63039264. Its totient is φ = 23224824.

The previous prime is 40643569. The next prime is 40643597. The reversal of 40643589 is 98534604.

It is not a de Polignac number, because 40643589 - 2¹¹ = 40641541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40643509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138097 + ... + 138390.

It is an arithmetic number, because the mean of its divisors is an integer number (5253272).

Almost surely, 2^40643589 is an apocalyptic number.

40643589 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

40643589 is a deficient number, since it is larger than the sum of its proper divisors (22395675).

40643589 is a wasteful number, since it uses less digits than its factorization.

40643589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276504 (or 276497 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 40643589 is about 6375.2324663498. The cubic root of 40643589 is about 343.8196419120.

The spelling of 40643589 in words is "forty million, six hundred forty-three thousand, five hundred eighty-nine".