1170128820 has 144 divisors (see below), whose sum is σ = 3823581888. Its totient is φ = 266595840.

The previous prime is 1170128809. The next prime is 1170128833. The reversal of 1170128820 is 288210711.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1537240 + ... + 1538000.

It is an arithmetic number, because the mean of its divisors is an integer number (26552652).

Almost surely, 2^1170128820 is an apocalyptic number.

1170128820 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 1170128820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1911790944).

1170128820 is an abundant number, since it is smaller than the sum of its proper divisors (2653453068).

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

1170128820 is a wasteful number, since it uses less digits than its factorization.

1170128820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 1170128820 is about 34207.1457447125. The cubic root of 1170128820 is about 1053.7669143375.

The spelling of 1170128820 in words is "one billion, one hundred seventy million, one hundred twenty-eight thousand, eight hundred twenty".