1385047540 has 24 divisors (see below), whose sum is σ = 3008897640. Its totient is φ = 534914688.

The previous prime is 1385047507. The next prime is 1385047561. The reversal of 1385047540 is 457405831.

It can be written as a sum of positive squares in 4 ways, for example, as 322417936 + 1062629604 = 17956^2 + 32598^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1385047540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1193427 + ... + 1194586.

It is an arithmetic number, because the mean of its divisors is an integer number (125370735).

Almost surely, 2^1385047540 is an apocalyptic number.

1385047540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385047540 is an abundant number, since it is smaller than the sum of its proper divisors (1623850100).

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

1385047540 is a wasteful number, since it uses less digits than its factorization.

1385047540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388051 (or 2388049 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 1385047540 is about 37216.2268372279. The cubic root of 1385047540 is about 1114.6920235027.

The spelling of 1385047540 in words is "one billion, three hundred eighty-five million, forty-seven thousand, five hundred forty".