40645318 has 32 divisors (see below), whose sum is σ = 71737344. Its totient is φ = 16911072.

The previous prime is 40645307. The next prime is 40645331. The reversal of 40645318 is 81354604.

It is a happy number.

It is a super-2 number, since 2×40645318² = 3304083750642248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40645318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146596 + ... + 146872.

It is an arithmetic number, because the mean of its divisors is an integer number (2241792).

Almost surely, 2^40645318 is an apocalyptic number.

40645318 is a deficient number, since it is larger than the sum of its proper divisors (31092026).

40645318 is a wasteful number, since it uses less digits than its factorization.

40645318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 40645318 is about 6375.3680678060. The cubic root of 40645318 is about 343.8245172667.

The spelling of 40645318 in words is "forty million, six hundred forty-five thousand, three hundred eighteen".