1385660757 has 8 divisors (see below), whose sum is σ = 1989666784. Its totient is φ = 852714288.

The previous prime is 1385660743. The next prime is 1385660777. The reversal of 1385660757 is 7570665831.

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

It is not a de Polignac number, because 1385660757 - 2⁴ = 1385660741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385660707) 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, 17764843 + ... + 17764920.

It is an arithmetic number, because the mean of its divisors is an integer number (248708348).

Almost surely, 2^1385660757 is an apocalyptic number.

It is an amenable number.

1385660757 is a deficient number, since it is larger than the sum of its proper divisors (604006027).

1385660757 is a wasteful number, since it uses less digits than its factorization.

1385660757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35529779.

The product of its (nonzero) digits is 1058400, while the sum is 48.

The square root of 1385660757 is about 37224.4644958124. The cubic root of 1385660757 is about 1114.8565057619.

The spelling of 1385660757 in words is "one billion, three hundred eighty-five million, six hundred sixty thousand, seven hundred fifty-seven".