1999147392 has 192 divisors, whose sum is σ = 6509280960. Its totient is φ = 605698560.

The previous prime is 1999147391. The next prime is 1999147417. The reversal of 1999147392 is 2937419991.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999147391) 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, 339223 + ... + 345065.

It is an arithmetic number, because the mean of its divisors is an integer number (33902505).

Almost surely, 2^1999147392 is an apocalyptic number.

1999147392 is a gapful number since it is divisible by the number (12) 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 1999147392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3254640480).

1999147392 is an abundant number, since it is smaller than the sum of its proper divisors (4510133568).

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

1999147392 is an equidigital number, since it uses as much as digits as its factorization.

1999147392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5883 (or 5859 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 1999147392 is about 44711.8260866183. The cubic root of 1999147392 is about 1259.7419879864.

The spelling of 1999147392 in words is "one billion, nine hundred ninety-nine million, one hundred forty-seven thousand, three hundred ninety-two".