1867680242 has 4 divisors (see below), whose sum is σ = 2801520366. Its totient is φ = 933840120.

The previous prime is 1867680211. The next prime is 1867680251. The reversal of 1867680242 is 2420867681.

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., 1604883721 + 262796521 = 40061^2 + 16211^2 .

It is a super-3 number, since 3×1867680242³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1867680193 and 1867680202.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 466920059 + ... + 466920062.

Almost surely, 2^1867680242 is an apocalyptic number.

1867680242 is a deficient number, since it is larger than the sum of its proper divisors (933840124).

1867680242 is an equidigital number, since it uses as much as digits as its factorization.

1867680242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933840123.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 1867680242 is about 43216.6662527317. Note that the first 3 decimals coincide. The cubic root of 1867680242 is about 1231.4993155979.

The spelling of 1867680242 in words is "one billion, eight hundred sixty-seven million, six hundred eighty thousand, two hundred forty-two".