989996895 has 24 divisors (see below), whose sum is σ = 1717424592. Its totient is φ = 527558400.

The previous prime is 989996893. The next prime is 989996923. The reversal of 989996895 is 598699989.

It is not a de Polignac number, because 989996895 - 2¹ = 989996893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989996893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49575 + ... + 66615.

It is an arithmetic number, because the mean of its divisors is an integer number (71559358).

Almost surely, 2^989996895 is an apocalyptic number.

989996895 is a deficient number, since it is larger than the sum of its proper divisors (727427697).

989996895 is a wasteful number, since it uses less digits than its factorization.

989996895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18343 (or 18340 counting only the distinct ones).

The product of its digits is 113374080, while the sum is 72.

The square root of 989996895 is about 31464.2161033769. The cubic root of 989996895 is about 996.6544514535.

The spelling of 989996895 in words is "nine hundred eighty-nine million, nine hundred ninety-six thousand, eight hundred ninety-five".