385707449 has 4 divisors (see below), whose sum is σ = 385807440. Its totient is φ = 385607460.

The previous prime is 385707317. The next prime is 385707451. The reversal of 385707449 is 944707583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 944707583 = 191 ⋅4946113.

It is a cyclic number.

It is not a de Polignac number, because 385707449 - 2⁸ = 385707193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385767449) 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, 43967 + ... + 52004.

It is an arithmetic number, because the mean of its divisors is an integer number (96451860).

Almost surely, 2^385707449 is an apocalyptic number.

It is an amenable number.

385707449 is a deficient number, since it is larger than the sum of its proper divisors (99991).

385707449 is an equidigital number, since it uses as much as digits as its factorization.

385707449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99990.

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 385707449 is about 19639.4360662418. The cubic root of 385707449 is about 727.9239501375.

The spelling of 385707449 in words is "three hundred eighty-five million, seven hundred seven thousand, four hundred forty-nine".