40680220 has 48 divisors (see below), whose sum is σ = 98078400. Its totient is φ = 13883904.

The previous prime is 40680187. The next prime is 40680251. The reversal of 40680220 is 2208604.

It is a junction number, because it is equal to n+sod(n) for n = 40680191 and 40680200.

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, 38256 + ... + 39304.

It is an arithmetic number, because the mean of its divisors is an integer number (2043300).

Almost surely, 2^40680220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40680220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49039200).

40680220 is an abundant number, since it is smaller than the sum of its proper divisors (57398180).

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

40680220 is a wasteful number, since it uses less digits than its factorization.

40680220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 40680220 is about 6378.1047341667. The cubic root of 40680220 is about 343.9229027691.

Adding to 40680220 its reverse (2208604), we get a palindrome (42888824).

The spelling of 40680220 in words is "forty million, six hundred eighty thousand, two hundred twenty".