40318220 has 24 divisors (see below), whose sum is σ = 89649504. Its totient is φ = 15178496.

The previous prime is 40318193. The next prime is 40318231. The reversal of 40318220 is 2281304.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40318192 and 40318201.

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, 58952 + ... + 59631.

It is an arithmetic number, because the mean of its divisors is an integer number (3735396).

Almost surely, 2^40318220 is an apocalyptic number.

It is an amenable number.

40318220 is an abundant number, since it is smaller than the sum of its proper divisors (49331284).

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

40318220 is a wasteful number, since it uses less digits than its factorization.

40318220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118609 (or 118607 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 40318220 is about 6349.6629831827. The cubic root of 40318220 is about 342.8997091662.

Adding to 40318220 its reverse (2281304), we get a palindrome (42599524).

The spelling of 40318220 in words is "forty million, three hundred eighteen thousand, two hundred twenty".