1031889408 has 160 divisors (see below), whose sum is σ = 3025788480. Its totient is φ = 309903360.

The previous prime is 1031889403. The next prime is 1031889421. The reversal of 1031889408 is 8049881301.

It is a self number, because there is not a number n which added to its sum of digits gives 1031889408.

It is not an unprimeable number, because it can be changed into a prime (1031889403) 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, 2652478 + ... + 2652866.

It is an arithmetic number, because the mean of its divisors is an integer number (18911178).

Almost surely, 2^1031889408 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 1031889408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512894240).

1031889408 is an abundant number, since it is smaller than the sum of its proper divisors (1993899072).

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

1031889408 is a wasteful number, since it uses less digits than its factorization.

1031889408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 1031889408 is about 32123.0354730060. The cubic root of 1031889408 is about 1010.5187701922.

The spelling of 1031889408 in words is "one billion, thirty-one million, eight hundred eighty-nine thousand, four hundred eight".