989403705870 has 32 divisors (see below), whose sum is σ = 2374617015072. Its totient is φ = 263835641472.

The previous prime is 989403705869. The next prime is 989403705893. The reversal of 989403705870 is 78507304989.

989403705870 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1302244 + ... + 1916936.

It is an arithmetic number, because the mean of its divisors is an integer number (74206781721).

Almost surely, 2^989403705870 is an apocalyptic number.

989403705870 is an abundant number, since it is smaller than the sum of its proper divisors (1385213309202).

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

989403705870 is a wasteful number, since it uses less digits than its factorization.

989403705870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668356.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 989403705870 in words is "nine hundred eighty-nine billion, four hundred three million, seven hundred five thousand, eight hundred seventy".