1399571712 has 540 divisors, whose sum is σ = 5358828384. Its totient is φ = 347719680.

The previous prime is 1399571683. The next prime is 1399571717. The reversal of 1399571712 is 2171759931.

It is a happy number.

1399571712 is a `hidden beast` number, since 1 + 3 + 9 + 9 + 571 + 71 + 2 = 666.

It is a super-2 number, since 2×1399571712² = 3917601954061221888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399571717) by changing a digit.

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 59 ways as a sum of consecutive naturals, for example, 60850933 + ... + 60850955.

Almost surely, 2^1399571712 is an apocalyptic number.

1399571712 is a gapful number since it is divisible by the number (12) 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 1399571712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2679414192).

1399571712 is an abundant number, since it is smaller than the sum of its proper divisors (3959256672).

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

1399571712 is an equidigital number, since it uses as much as digits as its factorization.

1399571712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 46 counting only the distinct ones).

The product of its digits is 119070, while the sum is 45.

The square root of 1399571712 is about 37410.8501908203. The cubic root of 1399571712 is about 1118.5748540063.

The spelling of 1399571712 in words is "one billion, three hundred ninety-nine million, five hundred seventy-one thousand, seven hundred twelve".