1989300628 has 72 divisors (see below), whose sum is σ = 4426410240. Its totient is φ = 776482560.

The previous prime is 1989300583. The next prime is 1989300629. The reversal of 1989300628 is 8260039891.

It is a super-2 number, since 2×1989300628² = 7914633977122388768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989300629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93663 + ... + 112921.

It is an arithmetic number, because the mean of its divisors is an integer number (61477920).

Almost surely, 2^1989300628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989300628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2213205120).

1989300628 is an abundant number, since it is smaller than the sum of its proper divisors (2437109612).

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

1989300628 is a wasteful number, since it uses less digits than its factorization.

1989300628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19325 (or 19316 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1989300628 is about 44601.5765192218. The cubic root of 1989300628 is about 1257.6703041824.

The spelling of 1989300628 in words is "one billion, nine hundred eighty-nine million, three hundred thousand, six hundred twenty-eight".