2040405380 has 24 divisors (see below), whose sum is σ = 4614455832. Its totient is φ = 753380352.

The previous prime is 2040405377. The next prime is 2040405391. The reversal of 2040405380 is 835040402.

It can be written as a sum of positive squares in 4 ways, for example, as 13424896 + 2026980484 = 3664^2 + 45022^2 .

It is a super-2 number, since 2×2040405380² = 8326508229465888800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 3923597 + ... + 3924116.

It is an arithmetic number, because the mean of its divisors is an integer number (192268993).

Almost surely, 2^2040405380 is an apocalyptic number.

2040405380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2040405380 is an abundant number, since it is smaller than the sum of its proper divisors (2574050452).

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

2040405380 is a wasteful number, since it uses less digits than its factorization.

2040405380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7847735 (or 7847733 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 2040405380 is about 45170.8465716550. The cubic root of 2040405380 is about 1268.3491435723.

Adding to 2040405380 its reverse (835040402), we get a palindrome (2875445782).

The spelling of 2040405380 in words is "two billion, forty million, four hundred five thousand, three hundred eighty".