1385897656 has 64 divisors (see below), whose sum is σ = 3151411200. Its totient is φ = 562723200.

The previous prime is 1385897629. The next prime is 1385897671. The reversal of 1385897656 is 6567985831.

It is a self number, because there is not a number n which added to its sum of digits gives 1385897656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15925 + ... + 55003.

It is an arithmetic number, because the mean of its divisors is an integer number (49240800).

Almost surely, 2^1385897656 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 1385897656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1575705600).

1385897656 is an abundant number, since it is smaller than the sum of its proper divisors (1765513544).

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

1385897656 is a wasteful number, since it uses less digits than its factorization.

1385897656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39140 (or 39136 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 58.

The square root of 1385897656 is about 37227.6463935071. The cubic root of 1385897656 is about 1114.9200358239.

The spelling of 1385897656 in words is "one billion, three hundred eighty-five million, eight hundred ninety-seven thousand, six hundred fifty-six".