445212240 has 120 divisors (see below), whose sum is σ = 1517132064. Its totient is φ = 107923200.

The previous prime is 445212197. The next prime is 445212241. The reversal of 445212240 is 42212544.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 445212240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445212241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21375 + ... + 36705.

Almost surely, 2^445212240 is an apocalyptic number.

445212240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445212240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758566032).

445212240 is an abundant number, since it is smaller than the sum of its proper divisors (1071919824).

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

445212240 is a wasteful number, since it uses less digits than its factorization.

445212240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15369 (or 15352 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 445212240 is about 21100.0530805020. The cubic root of 445212240 is about 763.5820288077.

Adding to 445212240 its reverse (42212544), we get a palindrome (487424784).

The spelling of 445212240 in words is "four hundred forty-five million, two hundred twelve thousand, two hundred forty".