1391968500 has 432 divisors, whose sum is σ = 4907972160. Its totient is φ = 305510400.

The previous prime is 1391968493. The next prime is 1391968631. The reversal of 1391968500 is 58691931.

It is a congruent number.

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 in 143 ways as a sum of consecutive naturals, for example, 73261491 + ... + 73261509.

Almost surely, 2^1391968500 is an apocalyptic number.

1391968500 is a gapful number since it is divisible by the number (10) 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 1391968500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2453986080).

1391968500 is an abundant number, since it is smaller than the sum of its proper divisors (3516003660).

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

1391968500 is a wasteful number, since it uses less digits than its factorization.

1391968500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 1391968500 is about 37309.0940656564. The cubic root of 1391968500 is about 1116.5456119856.

It can be divided in two parts, 139196 and 8500, that added together give a triangular number (147696 = T₅₄₃).

The spelling of 1391968500 in words is "one billion, three hundred ninety-one million, nine hundred sixty-eight thousand, five hundred".