2138628580 has 24 divisors (see below), whose sum is σ = 4899404160. Its totient is φ = 777683040.

The previous prime is 2138628571. The next prime is 2138628617. The reversal of 2138628580 is 858268312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4860300 + ... + 4860739.

It is an arithmetic number, because the mean of its divisors is an integer number (204141840).

Almost surely, 2^2138628580 is an apocalyptic number.

2138628580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2138628580 is an abundant number, since it is smaller than the sum of its proper divisors (2760775580).

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

2138628580 is a wasteful number, since it uses less digits than its factorization.

2138628580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9721059 (or 9721057 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 2138628580 is about 46245.3087350490. The cubic root of 2138628580 is about 1288.3834045311.

The spelling of 2138628580 in words is "two billion, one hundred thirty-eight million, six hundred twenty-eight thousand, five hundred eighty".