821480372 has 12 divisors (see below), whose sum is σ = 1439817120. Its totient is φ = 410104056.

The previous prime is 821480339. The next prime is 821480381. The reversal of 821480372 is 273084128.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156122 + ... + 161297.

It is an arithmetic number, because the mean of its divisors is an integer number (119984760).

Almost surely, 2^821480372 is an apocalyptic number.

It is an amenable number.

821480372 is a deficient number, since it is larger than the sum of its proper divisors (618336748).

821480372 is a wasteful number, since it uses less digits than its factorization.

821480372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318070 (or 318068 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 821480372 is about 28661.4788871754. The cubic root of 821480372 is about 936.5530812707.

The spelling of 821480372 in words is "eight hundred twenty-one million, four hundred eighty thousand, three hundred seventy-two".