445540420 has 48 divisors (see below), whose sum is σ = 1066888368. Its totient is φ = 154828800.

The previous prime is 445540411. The next prime is 445540441. The reversal of 445540420 is 24045544.

It can be written as a sum of positive squares in 8 ways, for example, as 105801796 + 339738624 = 10286^2 + 18432^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45981 + ... + 54820.

It is an arithmetic number, because the mean of its divisors is an integer number (22226841).

Almost surely, 2^445540420 is an apocalyptic number.

It is an amenable number.

445540420 is an abundant number, since it is smaller than the sum of its proper divisors (621347948).

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

445540420 is a wasteful number, since it uses less digits than its factorization.

445540420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100840 (or 100838 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 445540420 is about 21107.8284055940. The cubic root of 445540420 is about 763.7696028677.

Adding to 445540420 its reverse (24045544), we get a palindrome (469585964).

The spelling of 445540420 in words is "four hundred forty-five million, five hundred forty thousand, four hundred twenty".