381825826 has 4 divisors (see below), whose sum is σ = 572738742. Its totient is φ = 190912912.

The previous prime is 381825823. The next prime is 381825827. The reversal of 381825826 is 628528183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 628528183 = 263 ⋅2389841.

It can be written as a sum of positive squares in only one way, i.e., 369216225 + 12609601 = 19215^2 + 3551^2 .

It is a super-3 number, since 3×381825826³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (381825823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95456455 + ... + 95456458.

Almost surely, 2^381825826 is an apocalyptic number.

381825826 is a deficient number, since it is larger than the sum of its proper divisors (190912916).

381825826 is a wasteful number, since it uses less digits than its factorization.

381825826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190912915.

The product of its digits is 184320, while the sum is 43.

The square root of 381825826 is about 19540.3640191272. The cubic root of 381825826 is about 725.4738565321.

The spelling of 381825826 in words is "three hundred eighty-one million, eight hundred twenty-five thousand, eight hundred twenty-six".