1929147136 has 72 divisors (see below), whose sum is σ = 4456901120. Its totient is φ = 816251904.

The previous prime is 1929147091. The next prime is 1929147137. The reversal of 1929147136 is 6317419291.

It is a junction number, because it is equal to n+sod(n) for n = 1929147092 and 1929147101.

It is not an unprimeable number, because it can be changed into a prime (1929147137) 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, 134755 + ... + 148381.

Almost surely, 2^1929147136 is an apocalyptic number.

1929147136 is a gapful number since it is divisible by the number (16) 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 1929147136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2228450560).

1929147136 is an abundant number, since it is smaller than the sum of its proper divisors (2527753984).

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

1929147136 is an equidigital number, since it uses as much as digits as its factorization.

1929147136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13729 (or 13715 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 1929147136 is about 43922.0575110047. The cubic root of 1929147136 is about 1244.8636455454.

The spelling of 1929147136 in words is "one billion, nine hundred twenty-nine million, one hundred forty-seven thousand, one hundred thirty-six".