398301940 has 48 divisors (see below), whose sum is σ = 894942720. Its totient is φ = 148452480.

The previous prime is 398301913. The next prime is 398301947. The reversal of 398301940 is 49103893.

It is a self number, because there is not a number n which added to its sum of digits gives 398301940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398301947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14589 + ... + 31771.

It is an arithmetic number, because the mean of its divisors is an integer number (18644640).

Almost surely, 2^398301940 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 398301940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (447471360).

398301940 is an abundant number, since it is smaller than the sum of its proper divisors (496640780).

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

398301940 is a wasteful number, since it uses less digits than its factorization.

398301940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17272 (or 17270 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 398301940 is about 19957.5033508703. The cubic root of 398301940 is about 735.7622031280.

The spelling of 398301940 in words is "three hundred ninety-eight million, three hundred one thousand, nine hundred forty".