2798691840 has 720 divisors, whose sum is σ = 11752698672. Its totient is φ = 613122048.

The previous prime is 2798691839. The next prime is 2798691859. The reversal of 2798691840 is 481968972.

It is a tau number, because it is divible by the number of its divisors (720).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 41771487 + ... + 41771553.

Almost surely, 2^2798691840 is an apocalyptic number.

2798691840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2798691840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5876349336).

2798691840 is an abundant number, since it is smaller than the sum of its proper divisors (8954006832).

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

2798691840 is a wasteful number, since it uses less digits than its factorization.

2798691840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 2798691840 is about 52902.6638270702. The cubic root of 2798691840 is about 1409.2402123561.

The spelling of 2798691840 in words is "two billion, seven hundred ninety-eight million, six hundred ninety-one thousand, eight hundred forty".