385440291 has 6 divisors (see below), whose sum is σ = 556747100. Its totient is φ = 256960188.

The previous prime is 385440281. The next prime is 385440343. The reversal of 385440291 is 192044583.

It is not a de Polignac number, because 385440291 - 2⁵ = 385440259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385440281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21413341 + ... + 21413358.

Almost surely, 2^385440291 is an apocalyptic number.

385440291 is a deficient number, since it is larger than the sum of its proper divisors (171306809).

385440291 is a wasteful number, since it uses less digits than its factorization.

385440291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42826705 (or 42826702 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 385440291 is about 19632.6333180244. The cubic root of 385440291 is about 727.7558472363.

The spelling of 385440291 in words is "three hundred eighty-five million, four hundred forty thousand, two hundred ninety-one".