2628857380 has 48 divisors (see below), whose sum is σ = 5575288320. Its totient is φ = 1041168128.

The previous prime is 2628857353. The next prime is 2628857383. The reversal of 2628857380 is 837588262.

It is a happy number.

It is a super-2 number, since 2×2628857380² = 13821782248760928800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2628857383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1311459 + ... + 1313461.

It is an arithmetic number, because the mean of its divisors is an integer number (116151840).

Almost surely, 2^2628857380 is an apocalyptic number.

2628857380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2628857380 is an abundant number, since it is smaller than the sum of its proper divisors (2946430940).

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

2628857380 is a wasteful number, since it uses less digits than its factorization.

2628857380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628 (or 2626 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The square root of 2628857380 is about 51272.3841848612. The cubic root of 2628857380 is about 1380.1374539274.

The spelling of 2628857380 in words is "two billion, six hundred twenty-eight million, eight hundred fifty-seven thousand, three hundred eighty".