1191970944 has 128 divisors (see below), whose sum is σ = 3532464000. Its totient is φ = 395688960.

The previous prime is 1191970939. The next prime is 1191970957. The reversal of 1191970944 is 4490791911.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×1191970944² = 2841589462680502272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1191970944.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1074262 + ... + 1075370.

It is an arithmetic number, because the mean of its divisors is an integer number (27597375).

Almost surely, 2^1191970944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1191970944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1766232000).

1191970944 is an abundant number, since it is smaller than the sum of its proper divisors (2340493056).

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

1191970944 is a wasteful number, since it uses less digits than its factorization.

1191970944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443 (or 1425 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 1191970944 is about 34524.9322084780. The cubic root of 1191970944 is about 1060.2832232385.

The spelling of 1191970944 in words is "one billion, one hundred ninety-one million, nine hundred seventy thousand, nine hundred forty-four".