381298918 has 64 divisors (see below), whose sum is σ = 771789312. Its totient is φ = 136442880.

The previous prime is 381298913. The next prime is 381298919. The reversal of 381298918 is 819892183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381298913) 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, 566230 + ... + 566902.

It is an arithmetic number, because the mean of its divisors is an integer number (12059208).

Almost surely, 2^381298918 is an apocalyptic number.

381298918 is an abundant number, since it is smaller than the sum of its proper divisors (390490394).

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

381298918 is a wasteful number, since it uses less digits than its factorization.

381298918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989.

The product of its digits is 248832, while the sum is 49.

The square root of 381298918 is about 19526.8768112056. The cubic root of 381298918 is about 725.1399923088.

The spelling of 381298918 in words is "three hundred eighty-one million, two hundred ninety-eight thousand, nine hundred eighteen".