381802398 has 16 divisors (see below), whose sum is σ = 768291456. Its totient is φ = 126486360.

The previous prime is 381802387. The next prime is 381802403. The reversal of 381802398 is 893208183.

It is a super-2 number, since 2×381802398² = 291546142237100808, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194218 + ... + 196173.

It is an arithmetic number, because the mean of its divisors is an integer number (48018216).

Almost surely, 2^381802398 is an apocalyptic number.

381802398 is an abundant number, since it is smaller than the sum of its proper divisors (386489058).

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

381802398 is a wasteful number, since it uses less digits than its factorization.

381802398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390559.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 381802398 is about 19539.7645328699. The cubic root of 381802398 is about 725.4590183974.

The spelling of 381802398 in words is "three hundred eighty-one million, eight hundred two thousand, three hundred ninety-eight".