1445491872 has 96 divisors (see below), whose sum is σ = 4599322560. Its totient is φ = 438024960.

The previous prime is 1445491871. The next prime is 1445491877. The reversal of 1445491872 is 2781945441.

1445491872 is a `hidden beast` number, since 14 + 454 + 9 + 187 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (1445491871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66543 + ... + 85550.

It is an arithmetic number, because the mean of its divisors is an integer number (47909610).

Almost surely, 2^1445491872 is an apocalyptic number.

1445491872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1445491872 is an abundant number, since it is smaller than the sum of its proper divisors (3153830688).

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

1445491872 is a wasteful number, since it uses less digits than its factorization.

1445491872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152123 (or 152109 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 1445491872 is about 38019.6248271863. The cubic root of 1445491872 is about 1130.6769828056.

The spelling of 1445491872 in words is "one billion, four hundred forty-five million, four hundred ninety-one thousand, eight hundred seventy-two".