385769840 has 20 divisors (see below), whose sum is σ = 896915064. Its totient is φ = 154307904.

The previous prime is 385769827. The next prime is 385769849. The reversal of 385769840 is 48967583.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385769849) 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, 2410982 + ... + 2411141.

Almost surely, 2^385769840 is an apocalyptic number.

It is an amenable number.

385769840 is an abundant number, since it is smaller than the sum of its proper divisors (511145224).

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

385769840 is a wasteful number, since it uses less digits than its factorization.

385769840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4822136 (or 4822130 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 385769840 is about 19641.0244132021. The cubic root of 385769840 is about 727.9631970285.

The spelling of 385769840 in words is "three hundred eighty-five million, seven hundred sixty-nine thousand, eight hundred forty".