1199687972 has 72 divisors (see below), whose sum is σ = 2575254528. Its totient is φ = 486864000.

The previous prime is 1199687971. The next prime is 1199687989. The reversal of 1199687972 is 2797869911.

It is a super-2 number, since 2×1199687972² = 2878502460322945568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199687971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 283472 + ... + 287672.

It is an arithmetic number, because the mean of its divisors is an integer number (35767424).

Almost surely, 2^1199687972 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 1199687972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287627264).

1199687972 is an abundant number, since it is smaller than the sum of its proper divisors (1375566556).

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

1199687972 is a wasteful number, since it uses less digits than its factorization.

1199687972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297 (or 4288 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 59.

The square root of 1199687972 is about 34636.5121223255. The cubic root of 1199687972 is about 1062.5664558572.

It can be divided in two parts, 1199 and 687972, that multiplied together give a palindrome (824878428).

The spelling of 1199687972 in words is "one billion, one hundred ninety-nine million, six hundred eighty-seven thousand, nine hundred seventy-two".