385844581 has 4 divisors (see below), whose sum is σ = 392169964. Its totient is φ = 379519200.

The previous prime is 385844531. The next prime is 385844593. The reversal of 385844581 is 185448583.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24502500 + 361342081 = 4950^2 + 19009^2 .

It is a cyclic number.

It is not a de Polignac number, because 385844581 - 2¹¹ = 385842533 is a prime.

It is a super-2 number, since 2×385844581² = 297752081374131122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385844531) 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, 3162600 + ... + 3162721.

It is an arithmetic number, because the mean of its divisors is an integer number (98042491).

Almost surely, 2^385844581 is an apocalyptic number.

It is an amenable number.

385844581 is a deficient number, since it is larger than the sum of its proper divisors (6325383).

385844581 is an equidigital number, since it uses as much as digits as its factorization.

385844581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6325382.

The product of its digits is 614400, while the sum is 46.

The square root of 385844581 is about 19642.9269967589. The cubic root of 385844581 is about 728.0102070833.

The spelling of 385844581 in words is "three hundred eighty-five million, eight hundred forty-four thousand, five hundred eighty-one".