1191060720 has 160 divisors (see below), whose sum is σ = 4125450240. Its totient is φ = 315843840.

The previous prime is 1191060719. The next prime is 1191060721. The reversal of 1191060720 is 270601911.

It is an interprime number because it is at equal distance from previous prime (1191060719) and next prime (1191060721).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191060721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 411117 + ... + 414003.

It is an arithmetic number, because the mean of its divisors is an integer number (25784064).

Almost surely, 2^1191060720 is an apocalyptic number.

1191060720 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 1191060720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2062725120).

1191060720 is an abundant number, since it is smaller than the sum of its proper divisors (2934389520).

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

1191060720 is a wasteful number, since it uses less digits than its factorization.

1191060720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100 (or 3088 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 1191060720 is about 34511.7475651408. The cubic root of 1191060720 is about 1060.0132667142.

The spelling of 1191060720 in words is "one billion, one hundred ninety-one million, sixty thousand, seven hundred twenty".