2776961628 has 72 divisors (see below), whose sum is σ = 8494248672. Its totient is φ = 746744832.

The previous prime is 2776961623. The next prime is 2776961657. The reversal of 2776961628 is 8261696772.

2776961628 is a `hidden beast` number, since 2 + 7 + 7 + 6 + 9 + 6 + 1 + 628 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2776961623) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 319825 + ... + 328392.

It is an arithmetic number, because the mean of its divisors is an integer number (117975676).

Almost surely, 2^2776961628 is an apocalyptic number.

2776961628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2776961628 is an abundant number, since it is smaller than the sum of its proper divisors (5717287044).

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

2776961628 is a wasteful number, since it uses less digits than its factorization.

2776961628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648251 (or 648246 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 2776961628 is about 52696.8844240340. The cubic root of 2776961628 is about 1405.5834218741.

The spelling of 2776961628 in words is "two billion, seven hundred seventy-six million, nine hundred sixty-one thousand, six hundred twenty-eight".