1320242688 has 120 divisors (see below), whose sum is σ = 3976294608. Its totient is φ = 420913152.

The previous prime is 1320242659. The next prime is 1320242713. The reversal of 1320242688 is 8862420231.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99756 + ... + 112212.

Almost surely, 2^1320242688 is an apocalyptic number.

1320242688 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 1320242688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1988147304).

1320242688 is an abundant number, since it is smaller than the sum of its proper divisors (2656051920).

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

1320242688 is a wasteful number, since it uses less digits than its factorization.

1320242688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12504 (or 12485 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 1320242688 is about 36335.1439793487. The cubic root of 1320242688 is about 1097.0285334746.

The spelling of 1320242688 in words is "one billion, three hundred twenty million, two hundred forty-two thousand, six hundred eighty-eight".