384740728 has 16 divisors (see below), whose sum is σ = 759357000. Its totient is φ = 182245536.

The previous prime is 384740717. The next prime is 384740729. The reversal of 384740728 is 827047483.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384740729) 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, 1265443 + ... + 1265746.

Almost surely, 2^384740728 is an apocalyptic number.

384740728 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

384740728 is a deficient number, since it is larger than the sum of its proper divisors (374616272).

384740728 is a wasteful number, since it uses less digits than its factorization.

384740728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531214 (or 2531210 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 43.

The square root of 384740728 is about 19614.8088953219. The cubic root of 384740728 is about 727.3152953152.

The spelling of 384740728 in words is "three hundred eighty-four million, seven hundred forty thousand, seven hundred twenty-eight".