385249909 has 16 divisors (see below), whose sum is σ = 445800960. Its totient is φ = 329238000.

The previous prime is 385249901. The next prime is 385249913. The reversal of 385249909 is 909942583.

It is a cyclic number.

It is not a de Polignac number, because 385249909 - 2³ = 385249901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385249901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20344 + ... + 34414.

It is an arithmetic number, because the mean of its divisors is an integer number (27862560).

Almost surely, 2^385249909 is an apocalyptic number.

It is an amenable number.

385249909 is a deficient number, since it is larger than the sum of its proper divisors (60551051).

385249909 is a wasteful number, since it uses less digits than its factorization.

385249909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14232.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 385249909 is about 19627.7841082482. The cubic root of 385249909 is about 727.6360064248.

The spelling of 385249909 in words is "three hundred eighty-five million, two hundred forty-nine thousand, nine hundred nine".