1356669888 has 112 divisors (see below), whose sum is σ = 4110557184. Its totient is φ = 386841600.

The previous prime is 1356669871. The next prime is 1356669893. The reversal of 1356669888 is 8889666531.

It is a Cunningham number, because it is equal to 36833²-1.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1178113 + ... + 1179263.

Almost surely, 2^1356669888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1356669888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2055278592).

1356669888 is an abundant number, since it is smaller than the sum of its proper divisors (2753887296).

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

1356669888 is a wasteful number, since it uses less digits than its factorization.

1356669888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050 (or 2040 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 60.

The square root of 1356669888 is about 36832.9999864252. Note that the first 4 decimals coincide. The cubic root of 1356669888 is about 1107.0266140948.

The spelling of 1356669888 in words is "one billion, three hundred fifty-six million, six hundred sixty-nine thousand, eight hundred eighty-eight".