2708297820 has 72 divisors (see below), whose sum is σ = 8498468160. Its totient is φ = 697307520.

The previous prime is 2708297807. The next prime is 2708297861. The reversal of 2708297820 is 287928072.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254196 + ... + 264635.

It is an arithmetic number, because the mean of its divisors is an integer number (118034280).

Almost surely, 2^2708297820 is an apocalyptic number.

2708297820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2708297820 is an abundant number, since it is smaller than the sum of its proper divisors (5790170340).

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

2708297820 is a wasteful number, since it uses less digits than its factorization.

2708297820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518875 (or 518870 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 2708297820 is about 52041.3087844647. The cubic root of 2708297820 is about 1393.9016752761.

The spelling of 2708297820 in words is "two billion, seven hundred eight million, two hundred ninety-seven thousand, eight hundred twenty".