381658000 has 40 divisors (see below), whose sum is σ = 922853880. Its totient is φ = 152662400.

The previous prime is 381657967. The next prime is 381658003. The reversal of 381658000 is 856183.

It can be written as a sum of positive squares in 4 ways, for example, as 2704 + 381655296 = 52^2 + 19536^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (381658003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93415 + ... + 97414.

It is an arithmetic number, because the mean of its divisors is an integer number (23071347).

Almost surely, 2^381658000 is an apocalyptic number.

It is an amenable number.

381658000 is an abundant number, since it is smaller than the sum of its proper divisors (541195880).

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

381658000 is a wasteful number, since it uses less digits than its factorization.

381658000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190852 (or 190836 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 381658000 is about 19536.0692054466. The cubic root of 381658000 is about 725.3675504541.

It can be divided in two parts, 3816 and 58000, that added together give a palindrome (61816).

The spelling of 381658000 in words is "three hundred eighty-one million, six hundred fifty-eight thousand".