2880640644 has 96 divisors (see below), whose sum is σ = 7963065600. Its totient is φ = 793013760.

The previous prime is 2880640601. The next prime is 2880640657. The reversal of 2880640644 is 4460460882.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 2880640596 and 2880640605.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1609302 + ... + 1611090.

It is an arithmetic number, because the mean of its divisors is an integer number (82948600).

Almost surely, 2^2880640644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2880640644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3981532800).

2880640644 is an abundant number, since it is smaller than the sum of its proper divisors (5082424956).

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

2880640644 is a wasteful number, since it uses less digits than its factorization.

2880640644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493 (or 2491 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 42.

The square root of 2880640644 is about 53671.5999761513. The cubic root of 2880640644 is about 1422.8628094540.

The spelling of 2880640644 in words is "two billion, eight hundred eighty million, six hundred forty thousand, six hundred forty-four".