40345389 has 24 divisors (see below), whose sum is σ = 67042560. Its totient is φ = 22902048.

The previous prime is 40345367. The next prime is 40345397. The reversal of 40345389 is 98354304.

It is not a de Polignac number, because 40345389 - 2¹¹ = 40343341 is a prime.

It is a super-2 number, since 2×40345389² = 3255500827122642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40345399) 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, 7852 + ... + 11930.

It is an arithmetic number, because the mean of its divisors is an integer number (2793440).

Almost surely, 2^40345389 is an apocalyptic number.

It is an amenable number.

40345389 is a deficient number, since it is larger than the sum of its proper divisors (26697171).

40345389 is a wasteful number, since it uses less digits than its factorization.

40345389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249 (or 4246 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 40345389 is about 6351.8020277713. The cubic root of 40345389 is about 342.9767144701.

The spelling of 40345389 in words is "forty million, three hundred forty-five thousand, three hundred eighty-nine".