989772 has 24 divisors (see below), whose sum is σ = 2639616. Its totient is φ = 282768.

The previous prime is 989761. The next prime is 989777. The reversal of 989772 is 277989.

989772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×989772² = 1959297223968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (989777) by changing a digit.

989772 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5808 + ... + 5975.

It is an arithmetic number, because the mean of its divisors is an integer number (109984).

2⁹⁸⁹⁷⁷² is an apocalyptic number.

It is an amenable number.

989772 is an abundant number, since it is smaller than the sum of its proper divisors (1649844).

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

989772 is a wasteful number, since it uses less digits than its factorization.

989772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11797 (or 11795 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 989772 is about 994.8728561982. The cubic root of 989772 is about 99.6578976612.

It can be divided in two parts, 98 and 9772, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 989772 in words is "nine hundred eighty-nine thousand, seven hundred seventy-two".