1385477284 has 27 divisors (see below), whose sum is σ = 2496849537. Its totient is φ = 672675984.

The previous prime is 1385477281. The next prime is 1385477299. The reversal of 1385477284 is 4827745831.

The square root of 1385477284 is 37222.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1239744100 + 145733184 = 35210^2 + 12072^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1385477281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2754177 + ... + 2754679.

Almost surely, 2^1385477284 is an apocalyptic number.

1385477284 is the 37222-nd square number.

It is an amenable number.

1385477284 is a deficient number, since it is larger than the sum of its proper divisors (1111372253).

1385477284 is an frugal number, since it uses more digits than its factorization.

1385477284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 542 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 49.

The cubic root of 1385477284 is about 1114.8072981678.

Multiplying 1385477284 by its sum of digits (49), we get a square (67888386916 = 260554²).

The spelling of 1385477284 in words is "one billion, three hundred eighty-five million, four hundred seventy-seven thousand, two hundred eighty-four".