385690638 has 8 divisors (see below), whose sum is σ = 771381288. Its totient is φ = 128563544.

The previous prime is 385690637. The next prime is 385690639. The reversal of 385690638 is 836096583.

It is an interprime number because it is at equal distance from previous prime (385690637) and next prime (385690639).

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

385690638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385690631) 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, 32140881 + ... + 32140892.

It is an arithmetic number, because the mean of its divisors is an integer number (96422661).

Almost surely, 2^385690638 is an apocalyptic number.

385690638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385690638 is a wasteful number, since it uses less digits than its factorization.

385690638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64281778.

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 385690638 is about 19639.0080706740. The cubic root of 385690638 is about 727.9133744993.

The spelling of 385690638 in words is "three hundred eighty-five million, six hundred ninety thousand, six hundred thirty-eight".