398184380 has 72 divisors (see below), whose sum is σ = 944168064. Its totient is φ = 140849280.

The previous prime is 398184379. The next prime is 398184383. The reversal of 398184380 is 83481893.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398184383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87317 + ... + 91763.

Almost surely, 2^398184380 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 398184380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (472084032).

398184380 is an abundant number, since it is smaller than the sum of its proper divisors (545983684).

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

398184380 is a wasteful number, since it uses less digits than its factorization.

398184380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4515 (or 4502 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 398184380 is about 19954.5578753326. The cubic root of 398184380 is about 735.6898085389.

The spelling of 398184380 in words is "three hundred ninety-eight million, one hundred eighty-four thousand, three hundred eighty".