1489666620 has 192 divisors, whose sum is σ = 4684732416. Its totient is φ = 351267840.

The previous prime is 1489666609. The next prime is 1489666643. The reversal of 1489666620 is 266669841.

It is a happy number.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1489666620.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2048697 + ... + 2049423.

It is an arithmetic number, because the mean of its divisors is an integer number (24399648).

Almost surely, 2^1489666620 is an apocalyptic number.

1489666620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1489666620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2342366208).

1489666620 is an abundant number, since it is smaller than the sum of its proper divisors (3195065796).

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

1489666620 is a wasteful number, since it uses less digits than its factorization.

1489666620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 1489666620 is about 38596.1995538421. The cubic root of 1489666620 is about 1142.0795682928.

The spelling of 1489666620 in words is "one billion, four hundred eighty-nine million, six hundred sixty-six thousand, six hundred twenty".