1167720090 has 96 divisors (see below), whose sum is σ = 2998135296. Its totient is φ = 290760960.

The previous prime is 1167720077. The next prime is 1167720109. The reversal of 1167720090 is 900277611.

It is a Curzon 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, 781384 + ... + 782876.

It is an arithmetic number, because the mean of its divisors is an integer number (31230576).

Almost surely, 2^1167720090 is an apocalyptic number.

1167720090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1167720090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1499067648).

1167720090 is an abundant number, since it is smaller than the sum of its proper divisors (1830415206).

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

1167720090 is a wasteful number, since it uses less digits than its factorization.

1167720090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 1167720090 is about 34171.9196124537. The cubic root of 1167720090 is about 1053.0433519398.

The spelling of 1167720090 in words is "one billion, one hundred sixty-seven million, seven hundred twenty thousand, ninety".