398043366 has 48 divisors (see below), whose sum is σ = 934631280. Its totient is φ = 112674240.

The previous prime is 398043341. The next prime is 398043367. The reversal of 398043366 is 663340893.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398043367) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 25836 + ... + 38256.

It is an arithmetic number, because the mean of its divisors is an integer number (19471485).

Almost surely, 2^398043366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398043366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467315640).

398043366 is an abundant number, since it is smaller than the sum of its proper divisors (536587914).

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

398043366 is a wasteful number, since it uses less digits than its factorization.

398043366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12549 (or 12542 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 398043366 is about 19951.0241842368. The cubic root of 398043366 is about 735.6029519495.

The spelling of 398043366 in words is "three hundred ninety-eight million, forty-three thousand, three hundred sixty-six".