40101818 has 16 divisors (see below), whose sum is σ = 63789120. Its totient is φ = 18854496.

The previous prime is 40101797. The next prime is 40101823. The reversal of 40101818 is 81810104.

It is a junction number, because it is equal to n+sod(n) for n = 40101793 and 40101802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1355 + ... + 9057.

It is an arithmetic number, because the mean of its divisors is an integer number (3986820).

Almost surely, 2^40101818 is an apocalyptic number.

40101818 is a deficient number, since it is larger than the sum of its proper divisors (23687302).

40101818 is a wasteful number, since it uses less digits than its factorization.

40101818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7861.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 40101818 is about 6332.5996241670. The cubic root of 40101818 is about 342.2851206906.

The spelling of 40101818 in words is "forty million, one hundred one thousand, eight hundred eighteen".