1912729728 has 256 divisors, whose sum is σ = 6317015040. Its totient is φ = 499322880.

The previous prime is 1912729699. The next prime is 1912729733. The reversal of 1912729728 is 8279272191.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4437673 + ... + 4438103.

It is an arithmetic number, because the mean of its divisors is an integer number (24675840).

Almost surely, 2^1912729728 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 1912729728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3158507520).

1912729728 is an abundant number, since it is smaller than the sum of its proper divisors (4404285312).

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

1912729728 is a wasteful number, since it uses less digits than its factorization.

1912729728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 583 counting only the distinct ones).

The product of its digits is 254016, while the sum is 48.

The square root of 1912729728 is about 43734.7656676013. The cubic root of 1912729728 is about 1241.3222385443.

The spelling of 1912729728 in words is "one billion, nine hundred twelve million, seven hundred twenty-nine thousand, seven hundred twenty-eight".