445420140 has 48 divisors (see below), whose sum is σ = 1360558080. Its totient is φ = 107980480.

The previous prime is 445420117. The next prime is 445420141. The reversal of 445420140 is 41024544.

It is a happy number.

It is a super-2 number, since 2×445420140² = 396798202235239200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 445420140.

It is not an unprimeable number, because it can be changed into a prime (445420141) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 336780 + ... + 338099.

It is an arithmetic number, because the mean of its divisors is an integer number (28344960).

Almost surely, 2^445420140 is an apocalyptic number.

It is an amenable number.

445420140 is an abundant number, since it is smaller than the sum of its proper divisors (915137940).

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

445420140 is a wasteful number, since it uses less digits than its factorization.

445420140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674902 (or 674900 counting only the distinct ones).

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

The square root of 445420140 is about 21104.9790333940. The cubic root of 445420140 is about 763.7008665108.

Adding to 445420140 its reverse (41024544), we get a palindrome (486444684).

The spelling of 445420140 in words is "four hundred forty-five million, four hundred twenty thousand, one hundred forty".