2775888020 has 12 divisors (see below), whose sum is σ = 5829364884. Its totient is φ = 1110355200.

The previous prime is 2775888019. The next prime is 2775888023. The reversal of 2775888020 is 208885772.

It can be written as a sum of positive squares in 2 ways, for example, as 673298704 + 2102589316 = 25948^2 + 45854^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2775888023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69397181 + ... + 69397220.

It is an arithmetic number, because the mean of its divisors is an integer number (485780407).

Almost surely, 2^2775888020 is an apocalyptic number.

2775888020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2775888020 is an abundant number, since it is smaller than the sum of its proper divisors (3053476864).

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

2775888020 is a wasteful number, since it uses less digits than its factorization.

2775888020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138794410 (or 138794408 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 47.

The square root of 2775888020 is about 52686.6968028932. The cubic root of 2775888020 is about 1405.4022598318.

The spelling of 2775888020 in words is "two billion, seven hundred seventy-five million, eight hundred eighty-eight thousand, twenty".