1385427928 has 8 divisors (see below), whose sum is σ = 2597677380. Its totient is φ = 692713960.

The previous prime is 1385427893. The next prime is 1385427941. The reversal of 1385427928 is 8297245831.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86589238 + ... + 86589253.

Almost surely, 2^1385427928 is an apocalyptic number.

It is an amenable number.

1385427928 is a deficient number, since it is larger than the sum of its proper divisors (1212249452).

1385427928 is a wasteful number, since it uses less digits than its factorization.

1385427928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173178497 (or 173178493 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 1385427928 is about 37221.3369990923. The cubic root of 1385427928 is about 1114.7940601106.

The spelling of 1385427928 in words is "one billion, three hundred eighty-five million, four hundred twenty-seven thousand, nine hundred twenty-eight".