1368444890 has 8 divisors (see below), whose sum is σ = 2463200820. Its totient is φ = 547377952.

The previous prime is 1368444877. The next prime is 1368444901. The reversal of 1368444890 is 984448631.

It can be written as a sum of positive squares in 2 ways, for example, as 1365524209 + 2920681 = 36953^2 + 1709^2 .

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

It is a super-2 number, since 2×1368444890² = 3745282833934224200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68422235 + ... + 68422254.

Almost surely, 2^1368444890 is an apocalyptic number.

1368444890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1368444890 is a deficient number, since it is larger than the sum of its proper divisors (1094755930).

1368444890 is a wasteful number, since it uses less digits than its factorization.

1368444890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136844496.

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 1368444890 is about 36992.4977529228. The cubic root of 1368444890 is about 1110.2201467960.

The spelling of 1368444890 in words is "one billion, three hundred sixty-eight million, four hundred forty-four thousand, eight hundred ninety".