40140645 has 16 divisors (see below), whose sum is σ = 64851072. Its totient is φ = 21199680.

The previous prime is 40140643. The next prime is 40140647. The reversal of 40140645 is 54604104.

It is an interprime number because it is at equal distance from previous prime (40140643) and next prime (40140647).

It is not a de Polignac number, because 40140645 - 2¹ = 40140643 is a prime.

It is a super-2 number, since 2×40140645² = 3222542762032050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140641) 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, 11446 + ... + 14535.

It is an arithmetic number, because the mean of its divisors is an integer number (4053192).

Almost surely, 2^40140645 is an apocalyptic number.

It is an amenable number.

40140645 is a deficient number, since it is larger than the sum of its proper divisors (24710427).

40140645 is a wasteful number, since it uses less digits than its factorization.

40140645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26092.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 40140645 is about 6335.6645271037. The cubic root of 40140645 is about 342.3955530701.

Adding to 40140645 its reverse (54604104), we get a palindrome (94744749).

The spelling of 40140645 in words is "forty million, one hundred forty thousand, six hundred forty-five".