1929157992 has 32 divisors (see below), whose sum is σ = 5358772800. Its totient is φ = 643052592.

The previous prime is 1929157991. The next prime is 1929157999. The reversal of 1929157992 is 2997519291.

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

It is not an unprimeable number, because it can be changed into a prime (1929157991) 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, 4465428 + ... + 4465859.

It is an arithmetic number, because the mean of its divisors is an integer number (167461650).

Almost surely, 2^1929157992 is an apocalyptic number.

1929157992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1929157992 is an abundant number, since it is smaller than the sum of its proper divisors (3429614808).

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

1929157992 is a wasteful number, since it uses less digits than its factorization.

1929157992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8931302 (or 8931292 counting only the distinct ones).

The product of its digits is 918540, while the sum is 54.

The square root of 1929157992 is about 43922.1810933838. The cubic root of 1929157992 is about 1244.8659806385.

The spelling of 1929157992 in words is "one billion, nine hundred twenty-nine million, one hundred fifty-seven thousand, nine hundred ninety-two".