1445607440 has 20 divisors (see below), whose sum is σ = 3361037484. Its totient is φ = 578242944.

The previous prime is 1445607437. The next prime is 1445607467. The reversal of 1445607440 is 447065441.

It can be written as a sum of positive squares in 2 ways, for example, as 263347984 + 1182259456 = 16228^2 + 34384^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1445607440.

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 3 ways as a sum of consecutive naturals, for example, 9034967 + ... + 9035126.

Almost surely, 2^1445607440 is an apocalyptic number.

1445607440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445607440 is an abundant number, since it is smaller than the sum of its proper divisors (1915430044).

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

1445607440 is a wasteful number, since it uses less digits than its factorization.

1445607440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18070106 (or 18070100 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 1445607440 is about 38021.1446434744. The cubic root of 1445607440 is about 1130.7071147853.

The spelling of 1445607440 in words is "one billion, four hundred forty-five million, six hundred seven thousand, four hundred forty".