1488978989 has 8 divisors (see below), whose sum is σ = 1528188480. Its totient is φ = 1450269216.

The previous prime is 1488978977. The next prime is 1488979013. The reversal of 1488978989 is 9898798841.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1488978989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1488978289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118889 + ... + 130814.

It is an arithmetic number, because the mean of its divisors is an integer number (191023560).

Almost surely, 2^1488978989 is an apocalyptic number.

It is an amenable number.

1488978989 is a deficient number, since it is larger than the sum of its proper divisors (39209491).

1488978989 is an equidigital number, since it uses as much as digits as its factorization.

1488978989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249859.

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

The square root of 1488978989 is about 38587.2905112551. The cubic root of 1488978989 is about 1141.9038130439.

The spelling of 1488978989 in words is "one billion, four hundred eighty-eight million, nine hundred seventy-eight thousand, nine hundred eighty-nine".