1385445528 has 24 divisors (see below), whose sum is σ = 3752248500. Its totient is φ = 461815152.

The previous prime is 1385445487. The next prime is 1385445539. The reversal of 1385445528 is 8255445831.

1385445528 is a `hidden beast` number, since 1 + 3 + 85 + 4 + 45 + 528 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1385445528² = 3838918622110397568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9621078 + ... + 9621221.

Almost surely, 2^1385445528 is an apocalyptic number.

1385445528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1385445528 is an abundant number, since it is smaller than the sum of its proper divisors (2366802972).

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

1385445528 is a wasteful number, since it uses less digits than its factorization.

1385445528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19242311 (or 19242304 counting only the distinct ones).

The product of its digits is 768000, while the sum is 45.

The square root of 1385445528 is about 37221.5734218746. The cubic root of 1385445528 is about 1114.7987807441.

The spelling of 1385445528 in words is "one billion, three hundred eighty-five million, four hundred forty-five thousand, five hundred twenty-eight".