385722842 has 4 divisors (see below), whose sum is σ = 578584266. Its totient is φ = 192861420.

The previous prime is 385722839. The next prime is 385722847. The reversal of 385722842 is 248227583.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 282273601 + 103449241 = 16801^2 + 10171^2 .

It is a super-2 number, since 2×385722842² = 297564221681113928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 385722842.

It is not an unprimeable number, because it can be changed into a prime (385722847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96430709 + ... + 96430712.

Almost surely, 2^385722842 is an apocalyptic number.

385722842 is a deficient number, since it is larger than the sum of its proper divisors (192861424).

385722842 is a wasteful number, since it uses less digits than its factorization.

385722842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192861423.

The product of its digits is 215040, while the sum is 41.

The square root of 385722842 is about 19639.8279524032. The cubic root of 385722842 is about 727.9336334561.

It can be divided in two parts, 38572 and 2842, that added together give a palindrome (41414).

The spelling of 385722842 in words is "three hundred eighty-five million, seven hundred twenty-two thousand, eight hundred forty-two".