1191229152 has 48 divisors (see below), whose sum is σ = 3135589632. Its totient is φ = 395982720.

The previous prime is 1191229121. The next prime is 1191229153. The reversal of 1191229152 is 2519221911.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191229153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18327 + ... + 52137.

It is an arithmetic number, because the mean of its divisors is an integer number (65324784).

Almost surely, 2^1191229152 is an apocalyptic number.

1191229152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1191229152 is an abundant number, since it is smaller than the sum of its proper divisors (1944360480).

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

1191229152 is a wasteful number, since it uses less digits than its factorization.

1191229152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34191 (or 34183 counting only the distinct ones).

The product of its digits is 3240, while the sum is 33.

The square root of 1191229152 is about 34514.1876914407. The cubic root of 1191229152 is about 1060.0632310685.

The spelling of 1191229152 in words is "one billion, one hundred ninety-one million, two hundred twenty-nine thousand, one hundred fifty-two".