1445971900 has 36 divisors (see below), whose sum is σ = 3245964120. Its totient is φ = 558443200.

The previous prime is 1445971883. The next prime is 1445971903. The reversal of 1445971900 is 91795441.

It is a super-2 number, since 2×1445971900² = 4181669471179220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445971903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246406 + ... + 252205.

It is an arithmetic number, because the mean of its divisors is an integer number (90165670).

Almost surely, 2^1445971900 is an apocalyptic number.

1445971900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445971900 is an abundant number, since it is smaller than the sum of its proper divisors (1799992220).

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

1445971900 is a wasteful number, since it uses less digits than its factorization.

1445971900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498654 (or 498647 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1445971900 is about 38025.9372008107. The cubic root of 1445971900 is about 1130.8021297196.

The spelling of 1445971900 in words is "one billion, four hundred forty-five million, nine hundred seventy-one thousand, nine hundred".