989021492 has 12 divisors (see below), whose sum is σ = 1747924836. Its totient is φ = 489614400.

The previous prime is 989021483. The next prime is 989021503. The reversal of 989021492 is 294120989.

It can be written as a sum of positive squares in 2 ways, for example, as 836597776 + 152423716 = 28924^2 + 12346^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223633 + ... + 1224440.

It is an arithmetic number, because the mean of its divisors is an integer number (145660403).

Almost surely, 2^989021492 is an apocalyptic number.

It is an amenable number.

989021492 is a deficient number, since it is larger than the sum of its proper divisors (758903344).

989021492 is a wasteful number, since it uses less digits than its factorization.

989021492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448178 (or 2448176 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 989021492 is about 31448.7120880967. The cubic root of 989021492 is about 996.3270230910.

The spelling of 989021492 in words is "nine hundred eighty-nine million, twenty-one thousand, four hundred ninety-two".