1319991552 has 252 divisors, whose sum is σ = 4316265744. Its totient is φ = 399375360.

The previous prime is 1319991529. The next prime is 1319991577. The reversal of 1319991552 is 2551999131.

1319991552 is a `hidden beast` number, since 1 + 3 + 1 + 9 + 9 + 91 + 552 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1319991498 and 1319991507.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2052543 + ... + 2053185.

Almost surely, 2^1319991552 is an apocalyptic number.

1319991552 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 1319991552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2158132872).

1319991552 is an abundant number, since it is smaller than the sum of its proper divisors (2996274192).

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

1319991552 is an frugal number, since it uses more digits than its factorization.

1319991552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 659 counting only the distinct ones).

The product of its digits is 109350, while the sum is 45.

The square root of 1319991552 is about 36331.6879872103. The cubic root of 1319991552 is about 1096.9589702974.

The spelling of 1319991552 in words is "one billion, three hundred nineteen million, nine hundred ninety-one thousand, five hundred fifty-two".