398469378 has 8 divisors (see below), whose sum is σ = 796938768. Its totient is φ = 132823124.

The previous prime is 398469373. The next prime is 398469397. The reversal of 398469378 is 873964893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

398469378 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (398469371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33205776 + ... + 33205787.

It is an arithmetic number, because the mean of its divisors is an integer number (99617346).

Almost surely, 2^398469378 is an apocalyptic number.

398469378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

398469378 is a wasteful number, since it uses less digits than its factorization.

398469378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66411568.

The product of its digits is 7838208, while the sum is 57.

The square root of 398469378 is about 19961.6977734861. The cubic root of 398469378 is about 735.8652884850.

The spelling of 398469378 in words is "three hundred ninety-eight million, four hundred sixty-nine thousand, three hundred seventy-eight".