2040400220 has 24 divisors (see below), whose sum is σ = 4286058000. Its totient is φ = 815928192.

The previous prime is 2040400217. The next prime is 2040400247. The reversal of 2040400220 is 220040402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2040400195 and 2040400204.

It is a congruent number.

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, 69536 + ... + 94424.

It is an arithmetic number, because the mean of its divisors is an integer number (178585750).

Almost surely, 2^2040400220 is an apocalyptic number.

2040400220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2040400220 is an abundant number, since it is smaller than the sum of its proper divisors (2245657780).

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

2040400220 is a wasteful number, since it uses less digits than its factorization.

2040400220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28997 (or 28995 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 2040400220 is about 45170.7894551335. The cubic root of 2040400220 is about 1268.3480743915.

Adding to 2040400220 its reverse (220040402), we get a palindrome (2260440622).

The spelling of 2040400220 in words is "two billion, forty million, four hundred thousand, two hundred twenty".