445791620 has 24 divisors (see below), whose sum is σ = 937606488. Its totient is φ = 178041600.

The previous prime is 445791611. The next prime is 445791649. The reversal of 445791620 is 26197544.

It can be written as a sum of positive squares in 4 ways, for example, as 11235904 + 434555716 = 3352^2 + 20846^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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, 3641 + ... + 30080.

It is an arithmetic number, because the mean of its divisors is an integer number (39066937).

Almost surely, 2^445791620 is an apocalyptic number.

It is an amenable number.

445791620 is an abundant number, since it is smaller than the sum of its proper divisors (491814868).

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

445791620 is a wasteful number, since it uses less digits than its factorization.

445791620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34391 (or 34389 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 445791620 is about 21113.7779660581. Note that the first 3 decimals coincide. The cubic root of 445791620 is about 763.9131161305.

The spelling of 445791620 in words is "four hundred forty-five million, seven hundred ninety-one thousand, six hundred twenty".