820490896 has 10 divisors (see below), whose sum is σ = 1589701142. Its totient is φ = 410245440.

The previous prime is 820490887. The next prime is 820490899. The reversal of 820490896 is 698094028.

It can be written as a sum of positive squares in only one way, i.e., 794112400 + 26378496 = 28180^2 + 5136^2 .

It is not an unprimeable number, because it can be changed into a prime (820490899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25640325 + ... + 25640356.

Almost surely, 2^820490896 is an apocalyptic number.

It is an amenable number.

820490896 is a deficient number, since it is larger than the sum of its proper divisors (769210246).

820490896 is a wasteful number, since it uses less digits than its factorization.

820490896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51280689 (or 51280683 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 820490896 is about 28644.2122600710. The cubic root of 820490896 is about 936.1769030331.

The spelling of 820490896 in words is "eight hundred twenty million, four hundred ninety thousand, eight hundred ninety-six".