1005691680 has 288 divisors, whose sum is σ = 4095463680. Its totient is φ = 229824000.

The previous prime is 1005691669. The next prime is 1005691699. The reversal of 1005691680 is 861965001.

1005691680 is a `hidden beast` number, since 1 + 0 + 0 + 569 + 16 + 80 = 666.

1005691680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×1005691680² = 2022831510442444800, which contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 209305 + ... + 214055.

It is an arithmetic number, because the mean of its divisors is an integer number (14220360).

Almost surely, 2^1005691680 is an apocalyptic number.

1005691680 is a gapful number since it is divisible by the number (10) 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 1005691680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2047731840).

1005691680 is an abundant number, since it is smaller than the sum of its proper divisors (3089772000).

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

1005691680 is a wasteful number, since it uses less digits than its factorization.

1005691680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4789 (or 4768 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1005691680 is about 31712.6422740206. The cubic root of 1005691680 is about 1001.8936385363.

The spelling of 1005691680 in words is "one billion, five million, six hundred ninety-one thousand, six hundred eighty".