1681489348 has 48 divisors (see below), whose sum is σ = 3680861184. Its totient is φ = 652955040.

The previous prime is 1681489331. The next prime is 1681489349. The reversal of 1681489348 is 8439841861.

It is a junction number, because it is equal to n+sod(n) for n = 1681489295 and 1681489304.

It is not an unprimeable number, because it can be changed into a prime (1681489349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85665 + ... + 103447.

It is an arithmetic number, because the mean of its divisors is an integer number (76684608).

Almost surely, 2^1681489348 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 1681489348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1840430592).

1681489348 is an abundant number, since it is smaller than the sum of its proper divisors (1999371836).

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

1681489348 is a wasteful number, since it uses less digits than its factorization.

1681489348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18112 (or 18110 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 52.

The square root of 1681489348 is about 41005.9672242955. The cubic root of 1681489348 is about 1189.1355791866.

The spelling of 1681489348 in words is "one billion, six hundred eighty-one million, four hundred eighty-nine thousand, three hundred forty-eight".