385477281 has 36 divisors (see below), whose sum is σ = 657636096. Its totient is φ = 213133680.

The previous prime is 385477277. The next prime is 385477289. The reversal of 385477281 is 182774583.

385477281 is a `hidden beast` number, since 38 + 547 + 72 + 8 + 1 = 666.

It is not a de Polignac number, because 385477281 - 2² = 385477277 is a prime.

It is a super-2 number, since 2×385477281² = 297185468334305922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385477289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 57360 + ... + 63726.

Almost surely, 2^385477281 is an apocalyptic number.

385477281 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

385477281 is a deficient number, since it is larger than the sum of its proper divisors (272158815).

385477281 is a wasteful number, since it uses less digits than its factorization.

385477281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442 (or 6408 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 385477281 is about 19633.5753493856. The cubic root of 385477281 is about 727.7791269576.

The spelling of 385477281 in words is "three hundred eighty-five million, four hundred seventy-seven thousand, two hundred eighty-one".