2139787580 has 48 divisors (see below), whose sum is σ = 5158594560. Its totient is φ = 730340928.

The previous prime is 2139787577. The next prime is 2139787583. The reversal of 2139787580 is 857879312.

It is an interprime number because it is at equal distance from previous prime (2139787577) and next prime (2139787583).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139787583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3050 + ... + 65489.

It is an arithmetic number, because the mean of its divisors is an integer number (107470720).

Almost surely, 2^2139787580 is an apocalyptic number.

2139787580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139787580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2579297280).

2139787580 is an abundant number, since it is smaller than the sum of its proper divisors (3018806980).

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

2139787580 is a wasteful number, since it uses less digits than its factorization.

2139787580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68778 (or 68776 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 2139787580 is about 46257.8380385422. The cubic root of 2139787580 is about 1288.6161029864.

The spelling of 2139787580 in words is "two billion, one hundred thirty-nine million, seven hundred eighty-seven thousand, five hundred eighty".