821477652 has 24 divisors (see below), whose sum is σ = 1918782432. Its totient is φ = 273540000.

The previous prime is 821477651. The next prime is 821477659. The reversal of 821477652 is 256774128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821477651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23599 + ... + 46902.

It is an arithmetic number, because the mean of its divisors is an integer number (79949268).

Almost surely, 2^821477652 is an apocalyptic number.

It is an amenable number.

821477652 is an abundant number, since it is smaller than the sum of its proper divisors (1097304780).

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

821477652 is a wasteful number, since it uses less digits than its factorization.

821477652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71479 (or 71477 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 821477652 is about 28661.4314366886. The cubic root of 821477652 is about 936.5520475973.

The spelling of 821477652 in words is "eight hundred twenty-one million, four hundred seventy-seven thousand, six hundred fifty-two".