445665402 has 112 divisors (see below), whose sum is σ = 1233953280. Its totient is φ = 117503136.

The previous prime is 445665401. The next prime is 445665413. The reversal of 445665402 is 204566544.

445665402 is a `hidden beast` number, since 44 + 566 + 54 + 0 + 2 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (445665401) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 130999 + ... + 134357.

It is an arithmetic number, because the mean of its divisors is an integer number (11017440).

Almost surely, 2^445665402 is an apocalyptic number.

445665402 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 445665402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616976640).

445665402 is an abundant number, since it is smaller than the sum of its proper divisors (788287878).

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

445665402 is a wasteful number, since it uses less digits than its factorization.

445665402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399 (or 3384 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 445665402 is about 21110.7887583577. The cubic root of 445665402 is about 763.8410131698.

The spelling of 445665402 in words is "four hundred forty-five million, six hundred sixty-five thousand, four hundred two".