1368972648 has 144 divisors (see below), whose sum is σ = 4041648000. Its totient is φ = 418115520.

The previous prime is 1368972613. The next prime is 1368972653. The reversal of 1368972648 is 8462798631.

It is a super-2 number, since 2×1368972648² = 3748172221944263808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1368972594 and 1368972603.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 804903 + ... + 806601.

It is an arithmetic number, because the mean of its divisors is an integer number (28067000).

Almost surely, 2^1368972648 is an apocalyptic number.

1368972648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1368972648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2020824000).

1368972648 is an abundant number, since it is smaller than the sum of its proper divisors (2672675352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1368972648 is a wasteful number, since it uses less digits than its factorization.

1368972648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780 (or 1754 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 1368972648 is about 36999.6303765321. The cubic root of 1368972648 is about 1110.3628519112.

The spelling of 1368972648 in words is "one billion, three hundred sixty-eight million, nine hundred seventy-two thousand, six hundred forty-eight".