445621818 has 16 divisors (see below), whose sum is σ = 897750720. Its totient is φ = 147456096.

The previous prime is 445621793. The next prime is 445621829. The reversal of 445621818 is 818126544.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270238 + ... + 271881.

It is an arithmetic number, because the mean of its divisors is an integer number (56109420).

Almost surely, 2^445621818 is an apocalyptic number.

445621818 is an abundant number, since it is smaller than the sum of its proper divisors (452128902).

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

445621818 is a wasteful number, since it uses less digits than its factorization.

445621818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542261.

The product of its digits is 61440, while the sum is 39.

The square root of 445621818 is about 21109.7564647250. The cubic root of 445621818 is about 763.8161123273.

The spelling of 445621818 in words is "four hundred forty-five million, six hundred twenty-one thousand, eight hundred eighteen".