820520152 has 32 divisors (see below), whose sum is σ = 1625057280. Its totient is φ = 387787680.

The previous prime is 820520137. The next prime is 820520153. The reversal of 820520152 is 251025028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820520153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27808 + ... + 49135.

It is an arithmetic number, because the mean of its divisors is an integer number (50783040).

Almost surely, 2^820520152 is an apocalyptic number.

It is an amenable number.

820520152 is a deficient number, since it is larger than the sum of its proper divisors (804537128).

820520152 is a wasteful number, since it uses less digits than its factorization.

820520152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77023 (or 77019 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 820520152 is about 28644.7229346000. The cubic root of 820520152 is about 936.1880298947.

The spelling of 820520152 in words is "eight hundred twenty million, five hundred twenty thousand, one hundred fifty-two".