1391082860 has 12 divisors (see below), whose sum is σ = 2921274048. Its totient is φ = 556433136.

The previous prime is 1391082859. The next prime is 1391082881. The reversal of 1391082860 is 682801931.

It is a super-2 number, since 2×1391082860² = 3870223046771559200, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 34777052 + ... + 34777091.

It is an arithmetic number, because the mean of its divisors is an integer number (243439504).

Almost surely, 2^1391082860 is an apocalyptic number.

1391082860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1391082860 is an abundant number, since it is smaller than the sum of its proper divisors (1530191188).

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

1391082860 is a wasteful number, since it uses less digits than its factorization.

1391082860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69554152 (or 69554150 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1391082860 is about 37297.2232210389. The cubic root of 1391082860 is about 1116.3087610199.

The spelling of 1391082860 in words is "one billion, three hundred ninety-one million, eighty-two thousand, eight hundred sixty".