398050540 has 48 divisors (see below), whose sum is σ = 867041280. Its totient is φ = 153339840.

The previous prime is 398050483. The next prime is 398050553. The reversal of 398050540 is 45050893.

It is a junction number, because it is equal to n+sod(n) for n = 398050496 and 398050505.

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 15 ways as a sum of consecutive naturals, for example, 136821 + ... + 139699.

It is an arithmetic number, because the mean of its divisors is an integer number (18063360).

Almost surely, 2^398050540 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 398050540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433520640).

398050540 is an abundant number, since it is smaller than the sum of its proper divisors (468990740).

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

398050540 is a wasteful number, since it uses less digits than its factorization.

398050540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142 (or 3140 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 398050540 is about 19951.2039736954. The cubic root of 398050540 is about 735.6073712199.

The spelling of 398050540 in words is "three hundred ninety-eight million, fifty thousand, five hundred forty".