1445402880 has 252 divisors, whose sum is σ = 5194263900. Its totient is φ = 385191936.

The previous prime is 1445402879. The next prime is 1445402911. The reversal of 1445402880 is 882045441.

1445402880 is a `hidden beast` number, since 14 + 4 + 540 + 28 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 504631296 + 940771584 = 22464^2 + 30672^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 932346 + ... + 933894.

Almost surely, 2^1445402880 is an apocalyptic number.

1445402880 is a gapful number since it is divisible by the number (10) 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 1445402880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2597131950).

1445402880 is an abundant number, since it is smaller than the sum of its proper divisors (3748861020).

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

1445402880 is an frugal number, since it uses more digits than its factorization.

1445402880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The square root of 1445402880 is about 38018.4544662194. The cubic root of 1445402880 is about 1130.6537788769.

The spelling of 1445402880 in words is "one billion, four hundred forty-five million, four hundred two thousand, eight hundred eighty".