989451270 has 48 divisors (see below), whose sum is σ = 2601499680. Its totient is φ = 260886912.

The previous prime is 989451263. The next prime is 989451317. The reversal of 989451270 is 72154989.

It is a super-2 number, since 2×989451270² = 1958027631409225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53754 + ... + 69773.

It is an arithmetic number, because the mean of its divisors is an integer number (54197910).

Almost surely, 2^989451270 is an apocalyptic number.

989451270 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

989451270 is an abundant number, since it is smaller than the sum of its proper divisors (1612048410).

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

989451270 is a wasteful number, since it uses less digits than its factorization.

989451270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123629 (or 123626 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 989451270 is about 31455.5443443600. The cubic root of 989451270 is about 996.4713197281.

The spelling of 989451270 in words is "nine hundred eighty-nine million, four hundred fifty-one thousand, two hundred seventy".