340641986 has 4 divisors (see below), whose sum is σ = 510962982. Its totient is φ = 170320992.

The previous prime is 340641979. The next prime is 340641989. The reversal of 340641986 is 689146043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 251698225 + 88943761 = 15865^2 + 9431^2 .

It is not an unprimeable number, because it can be changed into a prime (340641989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85160495 + ... + 85160498.

Almost surely, 2^340641986 is an apocalyptic number.

340641986 is a deficient number, since it is larger than the sum of its proper divisors (170320996).

340641986 is a wasteful number, since it uses less digits than its factorization.

340641986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170320995.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 340641986 is about 18456.4889943889. The cubic root of 340641986 is about 698.3922188706.

The spelling of 340641986 in words is "three hundred forty million, six hundred forty-one thousand, nine hundred eighty-six".