445555580 has 12 divisors (see below), whose sum is σ = 935666760. Its totient is φ = 178222224.

The previous prime is 445555571. The next prime is 445555633. The reversal of 445555580 is 85555544.

It is a super-3 number, since 3×445555580³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11138870 + ... + 11138909.

It is an arithmetic number, because the mean of its divisors is an integer number (77972230).

Almost surely, 2^445555580 is an apocalyptic number.

It is an amenable number.

445555580 is an abundant number, since it is smaller than the sum of its proper divisors (490111180).

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

445555580 is a wasteful number, since it uses less digits than its factorization.

445555580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22277788 (or 22277786 counting only the distinct ones).

The product of its (nonzero) digits is 400000, while the sum is 41.

The square root of 445555580 is about 21108.1875110110. The cubic root of 445555580 is about 763.7782654681.

The spelling of 445555580 in words is "four hundred forty-five million, five hundred fifty-five thousand, five hundred eighty".