381726930 has 64 divisors (see below), whose sum is σ = 992694528. Its totient is φ = 93384960.

The previous prime is 381726899. The next prime is 381726937. The reversal of 381726930 is 39627183.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381726937) 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, 62200 + ... + 68060.

It is an arithmetic number, because the mean of its divisors is an integer number (15510852).

Almost surely, 2^381726930 is an apocalyptic number.

381726930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 381726930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496347264).

381726930 is an abundant number, since it is smaller than the sum of its proper divisors (610967598).

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

381726930 is a wasteful number, since it uses less digits than its factorization.

381726930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 381726930 is about 19537.8332985006. The cubic root of 381726930 is about 725.4112165771.

The spelling of 381726930 in words is "three hundred eighty-one million, seven hundred twenty-six thousand, nine hundred thirty".