40518945 has 48 divisors (see below), whose sum is σ = 73990800. Its totient is φ = 20482560.

The previous prime is 40518923. The next prime is 40518949. The reversal of 40518945 is 54981504.

It can be written as a sum of positive squares in 8 ways, for example, as 1468944 + 39050001 = 1212^2 + 6249^2 .

It is not a de Polignac number, because 40518945 - 2⁵ = 40518913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40518949) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79351 + ... + 79859.

It is an arithmetic number, because the mean of its divisors is an integer number (1541475).

Almost surely, 2^40518945 is an apocalyptic number.

40518945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40518945 is a deficient number, since it is larger than the sum of its proper divisors (33471855).

40518945 is a wasteful number, since it uses less digits than its factorization.

40518945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 40518945 is about 6365.4493164269. The cubic root of 40518945 is about 343.4678116072.

It can be divided in two parts, 4051 and 8945, that added together give a square (12996 = 114²).

The spelling of 40518945 in words is "forty million, five hundred eighteen thousand, nine hundred forty-five".