2186742730 has 8 divisors (see below), whose sum is σ = 3936136932. Its totient is φ = 874697088.

The previous prime is 2186742671. The next prime is 2186742731. The reversal of 2186742730 is 372476812.

It can be written as a sum of positive squares in 2 ways, for example, as 2120694601 + 66048129 = 46051^2 + 8127^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2186742731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109337127 + ... + 109337146.

Almost surely, 2^2186742730 is an apocalyptic number.

2186742730 is a deficient number, since it is larger than the sum of its proper divisors (1749394202).

2186742730 is a wasteful number, since it uses less digits than its factorization.

2186742730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218674280.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 2186742730 is about 46762.6210770953. The cubic root of 2186742730 is about 1297.9737131261.

The spelling of 2186742730 in words is "two billion, one hundred eighty-six million, seven hundred forty-two thousand, seven hundred thirty".