1385447445 has 48 divisors (see below), whose sum is σ = 2438092800. Its totient is φ = 727719552.

The previous prime is 1385447431. The next prime is 1385447467. The reversal of 1385447445 is 5447445831.

1385447445 is a `hidden beast` number, since 1 + 38 + 544 + 74 + 4 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1385447445 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1385447445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 850722 + ... + 852348.

It is an arithmetic number, because the mean of its divisors is an integer number (50793600).

Almost surely, 2^1385447445 is an apocalyptic number.

1385447445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1385447445 is a deficient number, since it is larger than the sum of its proper divisors (1052645355).

1385447445 is a wasteful number, since it uses less digits than its factorization.

1385447445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914 (or 1911 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 45.

The square root of 1385447445 is about 37221.5991730608. The cubic root of 1385447445 is about 1114.7992949152.

The spelling of 1385447445 in words is "one billion, three hundred eighty-five million, four hundred forty-seven thousand, four hundred forty-five".