905828989 has 8 divisors (see below), whose sum is σ = 993914712. Its totient is φ = 820372800.

The previous prime is 905828953. The next prime is 905828993. The reversal of 905828989 is 989828509.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19873764 + 885955225 = 4458^2 + 29765^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-905828989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905828999) 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, 656662 + ... + 658039.

It is an arithmetic number, because the mean of its divisors is an integer number (124239339).

Almost surely, 2^905828989 is an apocalyptic number.

It is an amenable number.

905828989 is a deficient number, since it is larger than the sum of its proper divisors (88085723).

905828989 is a wasteful number, since it uses less digits than its factorization.

905828989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314767.

The product of its (nonzero) digits is 3732480, while the sum is 58.

The square root of 905828989 is about 30096.9930225596. The cubic root of 905828989 is about 967.5692811616.

The spelling of 905828989 in words is "nine hundred five million, eight hundred twenty-eight thousand, nine hundred eighty-nine".