2602640020 has 24 divisors (see below), whose sum is σ = 5469000264. Its totient is φ = 1040397696.

The previous prime is 2602640017. The next prime is 2602640021. The reversal of 2602640020 is 200462062.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 78783376 + 2523856644 = 8876^2 + 50238^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2602639973 and 2602640000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2602640021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8079 + ... + 72598.

It is an arithmetic number, because the mean of its divisors is an integer number (227875011).

Almost surely, 2^2602640020 is an apocalyptic number.

2602640020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2602640020 is an abundant number, since it is smaller than the sum of its proper divisors (2866360244).

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

2602640020 is a wasteful number, since it uses less digits than its factorization.

2602640020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82299 (or 82297 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2602640020 is about 51016.0760937178. The cubic root of 2602640020 is about 1375.5341210879.

The spelling of 2602640020 in words is "two billion, six hundred two million, six hundred forty thousand, twenty".