1029111380 has 24 divisors (see below), whose sum is σ = 2357601120. Its totient is φ = 374222240.

The previous prime is 1029111367. The next prime is 1029111403. The reversal of 1029111380 is 831119201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2338670 + ... + 2339109.

It is an arithmetic number, because the mean of its divisors is an integer number (98233380).

Almost surely, 2^1029111380 is an apocalyptic number.

1029111380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1029111380 is an abundant number, since it is smaller than the sum of its proper divisors (1328489740).

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

1029111380 is a wasteful number, since it uses less digits than its factorization.

1029111380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677799 (or 4677797 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1029111380 is about 32079.7658969014. The cubic root of 1029111380 is about 1009.6111236963.

The spelling of 1029111380 in words is "one billion, twenty-nine million, one hundred eleven thousand, three hundred eighty".