40345645 has 16 divisors (see below), whose sum is σ = 51120000. Its totient is φ = 30483648.

The previous prime is 40345637. The next prime is 40345649. The reversal of 40345645 is 54654304.

It is a cyclic number.

It is not a de Polignac number, because 40345645 - 2³ = 40345637 is a prime.

It is a super-3 number, since 3×40345645³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40345649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56551 + ... + 57259.

It is an arithmetic number, because the mean of its divisors is an integer number (3195000).

Almost surely, 2^40345645 is an apocalyptic number.

It is an amenable number.

40345645 is a deficient number, since it is larger than the sum of its proper divisors (10774355).

40345645 is a wasteful number, since it uses less digits than its factorization.

40345645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 40345645 is about 6351.8221795009. The cubic root of 40345645 is about 342.9774398884.

Adding to 40345645 its reverse (54654304), we get a palindrome (94999949).

The spelling of 40345645 in words is "forty million, three hundred forty-five thousand, six hundred forty-five".