40501818 has 24 divisors (see below), whose sum is σ = 100290528. Its totient is φ = 11571912.

The previous prime is 40501817. The next prime is 40501819. The reversal of 40501818 is 81810504.

It is an interprime number because it is at equal distance from previous prime (40501817) and next prime (40501819).

It is a super-2 number, since 2×40501818² = 3280794522610248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40501791 and 40501800.

It is not an unprimeable number, because it can be changed into a prime (40501817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160596 + ... + 160847.

It is an arithmetic number, because the mean of its divisors is an integer number (4178772).

Almost surely, 2^40501818 is an apocalyptic number.

40501818 is an abundant number, since it is smaller than the sum of its proper divisors (59788710).

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

40501818 is a wasteful number, since it uses less digits than its factorization.

40501818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321458 (or 321455 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 40501818 is about 6364.1038646458. The cubic root of 40501818 is about 343.4194111842.

The spelling of 40501818 in words is "forty million, five hundred one thousand, eight hundred eighteen".