385770785 has 4 divisors (see below), whose sum is σ = 462924948. Its totient is φ = 308616624.

The previous prime is 385770779. The next prime is 385770787. The reversal of 385770785 is 587077583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 587077583 = 15991 ⋅36713.

It can be written as a sum of positive squares in 2 ways, for example, as 161010721 + 224760064 = 12689^2 + 14992^2 .

It is a cyclic number.

It is not a de Polignac number, because 385770785 - 2¹⁴ = 385754401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385770787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38577074 + ... + 38577083.

It is an arithmetic number, because the mean of its divisors is an integer number (115731237).

Almost surely, 2^385770785 is an apocalyptic number.

It is an amenable number.

385770785 is a deficient number, since it is larger than the sum of its proper divisors (77154163).

385770785 is an equidigital number, since it uses as much as digits as its factorization.

385770785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77154162.

The product of its (nonzero) digits is 1646400, while the sum is 50.

The square root of 385770785 is about 19641.0484699774. The cubic root of 385770785 is about 727.9637914457.

The spelling of 385770785 in words is "three hundred eighty-five million, seven hundred seventy thousand, seven hundred eighty-five".