2773649280 has 128 divisors (see below), whose sum is σ = 9361176480. Its totient is φ = 696123392.

The previous prime is 2773649251. The next prime is 2773649309. The reversal of 2773649280 is 829463772.

It is an interprime number because it is at equal distance from previous prime (2773649251) and next prime (2773649309).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9849 + ... + 75128.

Almost surely, 2^2773649280 is an apocalyptic number.

2773649280 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 2773649280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4680588240).

2773649280 is an abundant number, since it is smaller than the sum of its proper divisors (6587527200).

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

2773649280 is a wasteful number, since it uses less digits than its factorization.

2773649280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85016 (or 85004 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The square root of 2773649280 is about 52665.4467369261. The cubic root of 2773649280 is about 1405.0243415530.

The spelling of 2773649280 in words is "two billion, seven hundred seventy-three million, six hundred forty-nine thousand, two hundred eighty".