1029631980 has 96 divisors (see below), whose sum is σ = 3116832768. Its totient is φ = 252460800.

The previous prime is 1029631973. The next prime is 1029632027. The reversal of 1029631980 is 891369201.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208945 + ... + 213815.

It is an arithmetic number, because the mean of its divisors is an integer number (32467008).

Almost surely, 2^1029631980 is an apocalyptic number.

1029631980 is a gapful number since it is divisible by the number (10) 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 1029631980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1558416384).

1029631980 is an abundant number, since it is smaller than the sum of its proper divisors (2087200788).

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

1029631980 is a wasteful number, since it uses less digits than its factorization.

1029631980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5167 (or 5165 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 1029631980 is about 32087.8790199664. The cubic root of 1029631980 is about 1009.7813401103.

The spelling of 1029631980 in words is "one billion, twenty-nine million, six hundred thirty-one thousand, nine hundred eighty".