820734996 has 12 divisors (see below), whose sum is σ = 1915048352. Its totient is φ = 273578328.

The previous prime is 820734991. The next prime is 820734997. The reversal of 820734996 is 699437028.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820734991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34197280 + ... + 34197303.

Almost surely, 2^820734996 is an apocalyptic number.

It is an amenable number.

820734996 is an abundant number, since it is smaller than the sum of its proper divisors (1094313356).

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

820734996 is a wasteful number, since it uses less digits than its factorization.

820734996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68394590 (or 68394588 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 820734996 is about 28648.4728388792. The cubic root of 820734996 is about 936.2697328763.

The spelling of 820734996 in words is "eight hundred twenty million, seven hundred thirty-four thousand, nine hundred ninety-six".