989760805 has 8 divisors (see below), whose sum is σ = 1295686944. Its totient is φ = 719826000.

The previous prime is 989760763. The next prime is 989760809. The reversal of 989760805 is 508067989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 989760805 - 2⁷ = 989760677 is a prime.

It is a super-2 number, since 2×989760805² = 1959252902228496050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989760809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8997771 + ... + 8997880.

It is an arithmetic number, because the mean of its divisors is an integer number (161960868).

Almost surely, 2^989760805 is an apocalyptic number.

It is an amenable number.

989760805 is a deficient number, since it is larger than the sum of its proper divisors (305926139).

989760805 is a wasteful number, since it uses less digits than its factorization.

989760805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17995667.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 989760805 is about 31460.4641574151. The cubic root of 989760805 is about 996.5752192668.

The spelling of 989760805 in words is "nine hundred eighty-nine million, seven hundred sixty thousand, eight hundred five".