820697296 has 20 divisors (see below), whose sum is σ = 1633077892. Its totient is φ = 399257856.

The previous prime is 820697291. The next prime is 820697341. The reversal of 820697296 is 692796028.

It can be written as a sum of positive squares in 2 ways, for example, as 632019600 + 188677696 = 25140^2 + 13736^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820697291) 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, 692565 + ... + 693748.

Almost surely, 2^820697296 is an apocalyptic number.

It is an amenable number.

820697296 is a deficient number, since it is larger than the sum of its proper divisors (812380596).

820697296 is a wasteful number, since it uses less digits than its factorization.

820697296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386358 (or 1386352 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 820697296 is about 28647.8148555872. The cubic root of 820697296 is about 936.2553969824.

The spelling of 820697296 in words is "eight hundred twenty million, six hundred ninety-seven thousand, two hundred ninety-six".