1021996290 has 32 divisors (see below), whose sum is σ = 2803190400. Its totient is φ = 233599104.

The previous prime is 1021996273. The next prime is 1021996303. The reversal of 1021996290 is 926991201.

1021996290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2433115 + ... + 2433534.

It is an arithmetic number, because the mean of its divisors is an integer number (87599700).

Almost surely, 2^1021996290 is an apocalyptic number.

1021996290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021996290 is an abundant number, since it is smaller than the sum of its proper divisors (1781194110).

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

1021996290 is a wasteful number, since it uses less digits than its factorization.

1021996290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4866666.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 1021996290 is about 31968.6767007957. The cubic root of 1021996290 is about 1007.2789844957.

The spelling of 1021996290 in words is "one billion, twenty-one million, nine hundred ninety-six thousand, two hundred ninety".