445039280 has 160 divisors (see below), whose sum is σ = 1257538560. Its totient is φ = 143078400.

The previous prime is 445039267. The next prime is 445039303. The reversal of 445039280 is 82930544.

It is a super-3 number, since 3×445039280³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 445039280.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1606502 + ... + 1606778.

It is an arithmetic number, because the mean of its divisors is an integer number (7859616).

Almost surely, 2^445039280 is an apocalyptic number.

445039280 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 445039280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628769280).

445039280 is an abundant number, since it is smaller than the sum of its proper divisors (812499280).

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

445039280 is a wasteful number, since it uses less digits than its factorization.

445039280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 445039280 is about 21095.9541144742. The cubic root of 445039280 is about 763.4831349604.

The spelling of 445039280 in words is "four hundred forty-five million, thirty-nine thousand, two hundred eighty".