385587909 has 24 divisors (see below), whose sum is σ = 649521600. Its totient is φ = 220334184.

The previous prime is 385587907. The next prime is 385587911. The reversal of 385587909 is 909785583.

It is an interprime number because it is at equal distance from previous prime (385587907) and next prime (385587911).

It is not a de Polignac number, because 385587909 - 2¹ = 385587907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385587907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59367 + ... + 65540.

It is an arithmetic number, because the mean of its divisors is an integer number (27063400).

Almost surely, 2^385587909 is an apocalyptic number.

It is an amenable number.

385587909 is a deficient number, since it is larger than the sum of its proper divisors (263933691).

385587909 is a wasteful number, since it uses less digits than its factorization.

385587909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124934 (or 124917 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The square root of 385587909 is about 19636.3924639940. The cubic root of 385587909 is about 727.8487419971.

The spelling of 385587909 in words is "three hundred eighty-five million, five hundred eighty-seven thousand, nine hundred nine".