2689450920 has 192 divisors, whose sum is σ = 9614142720. Its totient is φ = 647880192.

The previous prime is 2689450901. The next prime is 2689450991. The reversal of 2689450920 is 290549862.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213847 + ... + 226073.

It is an arithmetic number, because the mean of its divisors is an integer number (50073660).

Almost surely, 2^2689450920 is an apocalyptic number.

2689450920 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 2689450920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4807071360).

2689450920 is an abundant number, since it is smaller than the sum of its proper divisors (6924691800).

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

2689450920 is a wasteful number, since it uses less digits than its factorization.

2689450920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12304 (or 12297 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 2689450920 is about 51859.9163130833. The cubic root of 2689450920 is about 1390.6607834213.

The spelling of 2689450920 in words is "two billion, six hundred eighty-nine million, four hundred fifty thousand, nine hundred twenty".