1929997488 has 90 divisors (see below), whose sum is σ = 5310600204. Its totient is φ = 603866112.

The previous prime is 1929997429. The next prime is 1929997507. The reversal of 1929997488 is 8847999291.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5174070 + ... + 5174442.

Almost surely, 2^1929997488 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 1929997488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2655300102).

1929997488 is an abundant number, since it is smaller than the sum of its proper divisors (3380602716).

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

1929997488 is an equidigital number, since it uses as much as digits as its factorization.

1929997488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 395 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 66.

The square root of 1929997488 is about 43931.7366831770. The cubic root of 1929997488 is about 1245.0465271882.

The spelling of 1929997488 in words is "one billion, nine hundred twenty-nine million, nine hundred ninety-seven thousand, four hundred eighty-eight".