1918028386 has 8 divisors (see below), whose sum is σ = 2882209500. Its totient is φ = 957291888.

The previous prime is 1918028377. The next prime is 1918028389. The reversal of 1918028386 is 6838208191.

It can be written as a sum of positive squares in 2 ways, for example, as 1838265625 + 79762761 = 42875^2 + 8931^2 .

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 (1918028389) 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, 859761 + ... + 861988.

Almost surely, 2^1918028386 is an apocalyptic number.

1918028386 is a deficient number, since it is larger than the sum of its proper divisors (964181114).

1918028386 is a wasteful number, since it uses less digits than its factorization.

1918028386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722308.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 1918028386 is about 43795.3009579795. The cubic root of 1918028386 is about 1242.4674217363.

The spelling of 1918028386 in words is "one billion, nine hundred eighteen million, twenty-eight thousand, three hundred eighty-six".