40018275 has 144 divisors (see below), whose sum is σ = 88208640. Its totient is φ = 17107200.

The previous prime is 40018261. The next prime is 40018283. The reversal of 40018275 is 57281004.

It is a Cunningham number, because it is equal to 6326²-1.

It is not a de Polignac number, because 40018275 - 2⁴ = 40018259 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1081557 + ... + 1081593.

It is an arithmetic number, because the mean of its divisors is an integer number (612560).

Almost surely, 2^40018275 is an apocalyptic number.

40018275 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40018275 is an abundant number, since it is smaller than the sum of its proper divisors (48190365).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40018275 is a wasteful number, since it uses less digits than its factorization.

40018275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 40018275 is about 6325.9999209611. Note that the first 4 decimals coincide. The cubic root of 40018275 is about 342.0472644229.

Adding to 40018275 its reverse (57281004), we get a palindrome (97299279).

The spelling of 40018275 in words is "forty million, eighteen thousand, two hundred seventy-five".