989443542 has 16 divisors (see below), whose sum is σ = 1979217072. Its totient is φ = 329759520.

The previous prime is 989443457. The next prime is 989443549. The reversal of 989443542 is 245344989.

It is a junction number, because it is equal to n+sod(n) for n = 989443491 and 989443500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989443549) 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, 43692 + ... + 62352.

It is an arithmetic number, because the mean of its divisors is an integer number (123701067).

Almost surely, 2^989443542 is an apocalyptic number.

989443542 is an abundant number, since it is smaller than the sum of its proper divisors (989773530).

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

989443542 is a wasteful number, since it uses less digits than its factorization.

989443542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27503.

The product of its digits is 1244160, while the sum is 48.

The square root of 989443542 is about 31455.4215040905. The cubic root of 989443542 is about 996.4687254449.

The spelling of 989443542 in words is "nine hundred eighty-nine million, four hundred forty-three thousand, five hundred forty-two".