1368991858 has 8 divisors (see below), whose sum is σ = 2211448428. Its totient is φ = 631842384.

The previous prime is 1368991831. The next prime is 1368991867. The reversal of 1368991858 is 8581998631.

It can be written as a sum of positive squares in 2 ways, for example, as 1331009289 + 37982569 = 36483^2 + 6163^2 .

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

It is a super-3 number, since 3×1368991858³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26326741 + ... + 26326792.

Almost surely, 2^1368991858 is an apocalyptic number.

1368991858 is a deficient number, since it is larger than the sum of its proper divisors (842456570).

1368991858 is a wasteful number, since it uses less digits than its factorization.

1368991858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52653548.

The product of its digits is 3732480, while the sum is 58.

The square root of 1368991858 is about 36999.8899728094. The cubic root of 1368991858 is about 1110.3680455798.

The spelling of 1368991858 in words is "one billion, three hundred sixty-eight million, nine hundred ninety-one thousand, eight hundred fifty-eight".