1385001668 has 6 divisors (see below), whose sum is σ = 2423752926. Its totient is φ = 692500832.

The previous prime is 1385001659. The next prime is 1385001677. The reversal of 1385001668 is 8661005831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1385001659) and next prime (1385001677).

It can be written as a sum of positive squares in only one way, i.e., 700237444 + 684764224 = 26462^2 + 26168^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173125205 + ... + 173125212.

It is an arithmetic number, because the mean of its divisors is an integer number (403958821).

Almost surely, 2^1385001668 is an apocalyptic number.

It is an amenable number.

1385001668 is a deficient number, since it is larger than the sum of its proper divisors (1038751258).

1385001668 is a wasteful number, since it uses less digits than its factorization.

1385001668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346250421 (or 346250419 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 1385001668 is about 37215.6105418143. The cubic root of 1385001668 is about 1114.6797173747.

The spelling of 1385001668 in words is "one billion, three hundred eighty-five million, one thousand, six hundred sixty-eight".