2140987770 has 24 divisors (see below), whose sum is σ = 5566568436. Its totient is φ = 570930048.

The previous prime is 2140987741. The next prime is 2140987781. The reversal of 2140987770 is 777890412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1759215249 + 381772521 = 41943^2 + 19539^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11894287 + ... + 11894466.

Almost surely, 2^2140987770 is an apocalyptic number.

2140987770 is an abundant number, since it is smaller than the sum of its proper divisors (3425580666).

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

2140987770 is a wasteful number, since it uses less digits than its factorization.

2140987770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23788766 (or 23788763 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 2140987770 is about 46270.8090484703. The cubic root of 2140987770 is about 1288.8569828303.

The spelling of 2140987770 in words is "two billion, one hundred forty million, nine hundred eighty-seven thousand, seven hundred seventy".