1445687985 has 32 divisors (see below), whose sum is σ = 2679770880. Its totient is φ = 651829248.

The previous prime is 1445687981. The next prime is 1445687989. The reversal of 1445687985 is 5897865441.

It is an interprime number because it is at equal distance from previous prime (1445687981) and next prime (1445687989).

It is not a de Polignac number, because 1445687985 - 2² = 1445687981 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1445687981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86640 + ... + 101969.

It is an arithmetic number, because the mean of its divisors is an integer number (83742840).

Almost surely, 2^1445687985 is an apocalyptic number.

1445687985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1445687985 is a deficient number, since it is larger than the sum of its proper divisors (1234082895).

1445687985 is a wasteful number, since it uses less digits than its factorization.

1445687985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188697.

The product of its digits is 9676800, while the sum is 57.

The square root of 1445687985 is about 38022.2038419658. The cubic root of 1445687985 is about 1130.7281142883.

The spelling of 1445687985 in words is "one billion, four hundred forty-five million, six hundred eighty-seven thousand, nine hundred eighty-five".