1029881856 has 120 divisors (see below), whose sum is σ = 2868816384. Its totient is φ = 328007680.

The previous prime is 1029881803. The next prime is 1029881873. The reversal of 1029881856 is 6581889201.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130041 + ... + 1130951.

Almost surely, 2^1029881856 is an apocalyptic number.

1029881856 is a gapful number since it is divisible by the number (16) 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 1029881856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1434408192).

1029881856 is an abundant number, since it is smaller than the sum of its proper divisors (1838934528).

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

1029881856 is an frugal number, since it uses more digits than its factorization.

1029881856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965 (or 939 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 48.

The square root of 1029881856 is about 32091.7724035305. The cubic root of 1029881856 is about 1009.8630196872.

The spelling of 1029881856 in words is "one billion, twenty-nine million, eight hundred eighty-one thousand, eight hundred fifty-six".