1385000657 has 8 divisors (see below), whose sum is σ = 1390170600. Its totient is φ = 1379839744.

The previous prime is 1385000651. The next prime is 1385000699. The reversal of 1385000657 is 7560005831.

It can be written as a sum of positive squares in 4 ways, for example, as 179452816 + 1205547841 = 13396^2 + 34721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1385000657 - 2³⁰ = 311258833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1385000651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476633 + ... + 479529.

It is an arithmetic number, because the mean of its divisors is an integer number (173771325).

Almost surely, 2^1385000657 is an apocalyptic number.

It is an amenable number.

1385000657 is a deficient number, since it is larger than the sum of its proper divisors (5169943).

1385000657 is a wasteful number, since it uses less digits than its factorization.

1385000657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4515.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 1385000657 is about 37215.5969588021. The cubic root of 1385000657 is about 1114.6794461497.

The spelling of 1385000657 in words is "one billion, three hundred eighty-five million, six hundred fifty-seven", and thus it is an aban number.