1445720900 has 36 divisors (see below), whose sum is σ = 3378541572. Its totient is φ = 533804160.

The previous prime is 1445720891. The next prime is 1445720911. The reversal of 1445720900 is 90275441.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 308142916 + 1137577984 = 17554^2 + 33728^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554747 + ... + 557346.

It is an arithmetic number, because the mean of its divisors is an integer number (93848377).

Almost surely, 2^1445720900 is an apocalyptic number.

1445720900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445720900 is an abundant number, since it is smaller than the sum of its proper divisors (1932820672).

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

1445720900 is a wasteful number, since it uses less digits than its factorization.

1445720900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112120 (or 1112113 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1445720900 is about 38022.6366786944. The cubic root of 1445720900 is about 1130.7366955852.

The spelling of 1445720900 in words is "one billion, four hundred forty-five million, seven hundred twenty thousand, nine hundred".