381790028 has 12 divisors (see below), whose sum is σ = 703297560. Its totient is φ = 180847872.

The previous prime is 381790027. The next prime is 381790039. The reversal of 381790028 is 820097183.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 381789973 and 381790000.

It is not an unprimeable number, because it can be changed into a prime (381790027) 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, 2511701 + ... + 2511852.

It is an arithmetic number, because the mean of its divisors is an integer number (58608130).

Almost surely, 2^381790028 is an apocalyptic number.

381790028 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

381790028 is a deficient number, since it is larger than the sum of its proper divisors (321507532).

381790028 is a wasteful number, since it uses less digits than its factorization.

381790028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5023576 (or 5023574 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 381790028 is about 19539.4479962971. The cubic root of 381790028 is about 725.4511836073.

The spelling of 381790028 in words is "three hundred eighty-one million, seven hundred ninety thousand, twenty-eight".