385102991 has 8 divisors (see below), whose sum is σ = 473973024. Its totient is φ = 304696800.

The previous prime is 385102981. The next prime is 385102997. The reversal of 385102991 is 199201583.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 385102991 - 2¹⁸ = 384840847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385102997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2115860 + ... + 2116041.

It is an arithmetic number, because the mean of its divisors is an integer number (59246628).

Almost surely, 2^385102991 is an apocalyptic number.

385102991 is a deficient number, since it is larger than the sum of its proper divisors (88870033).

385102991 is a wasteful number, since it uses less digits than its factorization.

385102991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231921.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 385102991 is about 19624.0411485504. The cubic root of 385102991 is about 727.5434981451.

The spelling of 385102991 in words is "three hundred eighty-five million, one hundred two thousand, nine hundred ninety-one".