385183840 has 24 divisors (see below), whose sum is σ = 909997200. Its totient is φ = 154073472.

The previous prime is 385183811. The next prime is 385183849. The reversal of 385183840 is 48381583.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 385183793 and 385183802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385183849) 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, 1203540 + ... + 1203859.

It is an arithmetic number, because the mean of its divisors is an integer number (37916550).

Almost surely, 2^385183840 is an apocalyptic number.

It is an amenable number.

385183840 is an abundant number, since it is smaller than the sum of its proper divisors (524813360).

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

385183840 is a wasteful number, since it uses less digits than its factorization.

385183840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407414 (or 2407406 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 385183840 is about 19626.1009882248. The cubic root of 385183840 is about 727.5944083776.

The spelling of 385183840 in words is "three hundred eighty-five million, one hundred eighty-three thousand, eight hundred forty".