820451372 has 24 divisors (see below), whose sum is σ = 1555737456. Its totient is φ = 376342848.

The previous prime is 820451371. The next prime is 820451417. The reversal of 820451372 is 273154028.

It is not an unprimeable number, because it can be changed into a prime (820451371) 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, 39923 + ... + 56874.

It is an arithmetic number, because the mean of its divisors is an integer number (64822394).

Almost surely, 2^820451372 is an apocalyptic number.

It is an amenable number.

820451372 is a deficient number, since it is larger than the sum of its proper divisors (735286084).

820451372 is a wasteful number, since it uses less digits than its factorization.

820451372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96977 (or 96975 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 820451372 is about 28643.5223392655. The cubic root of 820451372 is about 936.1618705486.

The spelling of 820451372 in words is "eight hundred twenty million, four hundred fifty-one thousand, three hundred seventy-two".