385702028109 has 12 divisors (see below), whose sum is σ = 557986250016. Its totient is φ = 256737255432.

The previous prime is 385702028071. The next prime is 385702028111. The reversal of 385702028109 is 901820207583.

It is a happy number.

385702028109 is a `hidden beast` number, since 38 + 570 + 20 + 28 + 1 + 0 + 9 = 666.

It is not a de Polignac number, because 385702028109 - 2⁷ = 385702027981 is a prime.

It is a super-2 number, since 2×385702028109² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385702028009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33113019 + ... + 33124664.

It is an arithmetic number, because the mean of its divisors is an integer number (46498854168).

Almost surely, 2^385702028109 is an apocalyptic number.

It is an amenable number.

385702028109 is a deficient number, since it is larger than the sum of its proper divisors (172284221907).

385702028109 is a wasteful number, since it uses less digits than its factorization.

385702028109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66238336 (or 66238333 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 385702028109 in words is "three hundred eighty-five billion, seven hundred two million, twenty-eight thousand, one hundred nine".