1029721896 has 80 divisors (see below), whose sum is σ = 3296214240. Its totient is φ = 294204960.

The previous prime is 1029721873. The next prime is 1029721939. The reversal of 1029721896 is 6981279201.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 108970 + ... + 118041.

It is an arithmetic number, because the mean of its divisors is an integer number (41202678).

Almost surely, 2^1029721896 is an apocalyptic number.

It is an amenable number.

1029721896 is an abundant number, since it is smaller than the sum of its proper divisors (2266492344).

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

1029721896 is a wasteful number, since it uses less digits than its factorization.

1029721896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227036 (or 227023 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 1029721896 is about 32089.2800791791. The cubic root of 1029721896 is about 1009.8107334139.

The spelling of 1029721896 in words is "one billion, twenty-nine million, seven hundred twenty-one thousand, eight hundred ninety-six".