2087639970 has 128 divisors (see below), whose sum is σ = 5501067264. Its totient is φ = 503967744.

The previous prime is 2087639969. The next prime is 2087639971. The reversal of 2087639970 is 799367802.

It is an interprime number because it is at equal distance from previous prime (2087639969) and next prime (2087639971).

It is not an unprimeable number, because it can be changed into a prime (2087639971) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 5596704 + ... + 5597076.

It is an arithmetic number, because the mean of its divisors is an integer number (42977088).

Almost surely, 2^2087639970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2087639970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2750533632).

2087639970 is an abundant number, since it is smaller than the sum of its proper divisors (3413427294).

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

2087639970 is a wasteful number, since it uses less digits than its factorization.

2087639970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The square root of 2087639970 is about 45690.6989440958. The cubic root of 2087639970 is about 1278.0618392838.

The spelling of 2087639970 in words is "two billion, eighty-seven million, six hundred thirty-nine thousand, nine hundred seventy".