2775503880 has 80 divisors (see below), whose sum is σ = 9328787820. Its totient is φ = 740133504.

The previous prime is 2775503879. The next prime is 2775503881. The reversal of 2775503880 is 883055772.

It is an interprime number because it is at equal distance from previous prime (2775503879) and next prime (2775503881).

It can be written as a sum of positive squares in 2 ways, for example, as 2685519684 + 89984196 = 51822^2 + 9486^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (2775503881) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 425079 + ... + 431558.

Almost surely, 2^2775503880 is an apocalyptic number.

2775503880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2775503880 is an abundant number, since it is smaller than the sum of its proper divisors (6553283940).

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

2775503880 is a wasteful number, since it uses less digits than its factorization.

2775503880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856660 (or 856647 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The square root of 2775503880 is about 52683.0511644874. The cubic root of 2775503880 is about 1405.3374281905.

The spelling of 2775503880 in words is "two billion, seven hundred seventy-five million, five hundred three thousand, eight hundred eighty".