385402836 has 144 divisors (see below), whose sum is σ = 1138292736. Its totient is φ = 100590336.

The previous prime is 385402817. The next prime is 385402861. The reversal of 385402836 is 638204583.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 385402794 and 385402803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 970590 + ... + 970986.

Almost surely, 2^385402836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385402836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569146368).

385402836 is an abundant number, since it is smaller than the sum of its proper divisors (752889900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385402836 is a wasteful number, since it uses less digits than its factorization.

385402836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 385402836 is about 19631.6793983602. The cubic root of 385402836 is about 727.7322733488.

The spelling of 385402836 in words is "three hundred eighty-five million, four hundred two thousand, eight hundred thirty-six".