1385646288 has 160 divisors (see below), whose sum is σ = 4115986560. Its totient is φ = 398131200.

The previous prime is 1385646287. The next prime is 1385646347. The reversal of 1385646288 is 8826465831.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1385646288.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385646281) 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 31 ways as a sum of consecutive naturals, for example, 864688 + ... + 866288.

It is an arithmetic number, because the mean of its divisors is an integer number (25724916).

Almost surely, 2^1385646288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1385646288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2057993280).

1385646288 is an abundant number, since it is smaller than the sum of its proper divisors (2730340272).

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

1385646288 is a wasteful number, since it uses less digits than its factorization.

1385646288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717 (or 1711 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 51.

The square root of 1385646288 is about 37224.2701473111. The cubic root of 1385646288 is about 1114.8526253232.

The spelling of 1385646288 in words is "one billion, three hundred eighty-five million, six hundred forty-six thousand, two hundred eighty-eight".