1856909914 has 4 divisors (see below), whose sum is σ = 2785364874. Its totient is φ = 928454956.

The previous prime is 1856909867. The next prime is 1856909927. The reversal of 1856909914 is 4199096581.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4199096581 = 4951 ⋅848131.

It can be written as a sum of positive squares in only one way, i.e., 1760222025 + 96687889 = 41955^2 + 9833^2 .

It is a super-2 number, since 2×1856909914² = 6896228857422974792, which contains 22 as substring.

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, 464227477 + ... + 464227480.

Almost surely, 2^1856909914 is an apocalyptic number.

1856909914 is a deficient number, since it is larger than the sum of its proper divisors (928454960).

1856909914 is an equidigital number, since it uses as much as digits as its factorization.

1856909914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928454959.

The product of its (nonzero) digits is 699840, while the sum is 52.

The square root of 1856909914 is about 43091.8775873134. The cubic root of 1856909914 is about 1229.1275267810.

The spelling of 1856909914 in words is "one billion, eight hundred fifty-six million, nine hundred nine thousand, nine hundred fourteen".