1021996794 has 32 divisors (see below), whose sum is σ = 2515685760. Its totient is φ = 269537472.

The previous prime is 1021996793. The next prime is 1021996799. The reversal of 1021996794 is 4976991201.

It is not an unprimeable number, because it can be changed into a prime (1021996793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 935349 + ... + 936440.

It is an arithmetic number, because the mean of its divisors is an integer number (78615180).

Almost surely, 2^1021996794 is an apocalyptic number.

1021996794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1021996794 is an abundant number, since it is smaller than the sum of its proper divisors (1493688966).

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

1021996794 is a wasteful number, since it uses less digits than its factorization.

1021996794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871814.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 1021996794 is about 31968.6845835108. The cubic root of 1021996794 is about 1007.2791500764.

The spelling of 1021996794 in words is "one billion, twenty-one million, nine hundred ninety-six thousand, seven hundred ninety-four".