385416731 has 16 divisors (see below), whose sum is σ = 443976960. Its totient is φ = 327745440.

The previous prime is 385416721. The next prime is 385416743. The reversal of 385416731 is 137614583.

It is a cyclic number.

It is not a de Polignac number, because 385416731 - 2⁶ = 385416667 is a prime.

It is a super-2 number, since 2×385416731² = 297092113069452722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (385416721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 919640 + ... + 920058.

It is an arithmetic number, because the mean of its divisors is an integer number (27748560).

Almost surely, 2^385416731 is an apocalyptic number.

385416731 is a deficient number, since it is larger than the sum of its proper divisors (58560229).

385416731 is a wasteful number, since it uses less digits than its factorization.

385416731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154.

The product of its digits is 60480, while the sum is 38.

The square root of 385416731 is about 19632.0332874616. The cubic root of 385416731 is about 727.7410189326.

The spelling of 385416731 in words is "three hundred eighty-five million, four hundred sixteen thousand, seven hundred thirty-one".