385969784 has 8 divisors (see below), whose sum is σ = 723693360. Its totient is φ = 192984888.

The previous prime is 385969769. The next prime is 385969789. The reversal of 385969784 is 487969583.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×385969784² = 297945348322013312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385969789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24123104 + ... + 24123119.

It is an arithmetic number, because the mean of its divisors is an integer number (90461670).

Almost surely, 2^385969784 is an apocalyptic number.

It is an amenable number.

385969784 is a deficient number, since it is larger than the sum of its proper divisors (337723576).

385969784 is a wasteful number, since it uses less digits than its factorization.

385969784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48246229 (or 48246225 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 59.

The square root of 385969784 is about 19646.1137123860. The cubic root of 385969784 is about 728.0889427618.

The spelling of 385969784 in words is "three hundred eighty-five million, nine hundred sixty-nine thousand, seven hundred eighty-four".