820407238 has 32 divisors (see below), whose sum is σ = 1421126208. Its totient is φ = 347942400.

The previous prime is 820407227. The next prime is 820407271. The reversal of 820407238 is 832704028.

It is a congruent 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, 998868 + ... + 999688.

It is an arithmetic number, because the mean of its divisors is an integer number (44410194).

Almost surely, 2^820407238 is an apocalyptic number.

820407238 is a deficient number, since it is larger than the sum of its proper divisors (600718970).

820407238 is a wasteful number, since it uses less digits than its factorization.

820407238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 820407238 is about 28642.7519278438. The cubic root of 820407238 is about 936.1450841347.

The spelling of 820407238 in words is "eight hundred twenty million, four hundred seven thousand, two hundred thirty-eight".