381374028 has 96 divisors (see below), whose sum is σ = 1166520320. Its totient is φ = 105442560.

The previous prime is 381374003. The next prime is 381374029. The reversal of 381374028 is 820473183.

It is a super-2 number, since 2×381374028² = 290892298465889568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 381373983 and 381374001.

It is not an unprimeable number, because it can be changed into a prime (381374029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15300 + ... + 31572.

Almost surely, 2^381374028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381374028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583260160).

381374028 is an abundant number, since it is smaller than the sum of its proper divisors (785146292).

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

381374028 is a wasteful number, since it uses less digits than its factorization.

381374028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16324 (or 16316 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 381374028 is about 19528.7999631314. The cubic root of 381374028 is about 725.1876029771.

It can be divided in two parts, 3813 and 74028, that added together give a square (77841 = 279²).

The spelling of 381374028 in words is "three hundred eighty-one million, three hundred seventy-four thousand, twenty-eight".