1489897988 has 6 divisors (see below), whose sum is σ = 2607321486. Its totient is φ = 744948992.

The previous prime is 1489897973. The next prime is 1489898017. The reversal of 1489897988 is 8897989841.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1330936324 + 158961664 = 36482^2 + 12608^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186237245 + ... + 186237252.

It is an arithmetic number, because the mean of its divisors is an integer number (434553581).

Almost surely, 2^1489897988 is an apocalyptic number.

It is an amenable number.

1489897988 is a deficient number, since it is larger than the sum of its proper divisors (1117423498).

1489897988 is a wasteful number, since it uses less digits than its factorization.

1489897988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372474501 (or 372474499 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 71.

The square root of 1489897988 is about 38599.1967273932. The cubic root of 1489897988 is about 1142.1386927043.

The spelling of 1489897988 in words is "one billion, four hundred eighty-nine million, eight hundred ninety-seven thousand, nine hundred eighty-eight".