398204940 has 192 divisors, whose sum is σ = 1381653504. Its totient is φ = 83607552.

The previous prime is 398204927. The next prime is 398204941. The reversal of 398204940 is 49402893.

It is not an unprimeable number, because it can be changed into a prime (398204941) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 306372 + ... + 307668.

It is an arithmetic number, because the mean of its divisors is an integer number (7196112).

Almost surely, 2^398204940 is an apocalyptic number.

398204940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398204940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (690826752).

398204940 is an abundant number, since it is smaller than the sum of its proper divisors (983448564).

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

398204940 is a wasteful number, since it uses less digits than its factorization.

398204940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 1374 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 398204940 is about 19955.0730392048. The cubic root of 398204940 is about 735.7024706145.

The spelling of 398204940 in words is "three hundred ninety-eight million, two hundred four thousand, nine hundred forty".