398216250 has 280 divisors, whose sum is σ = 1229231520. Its totient is φ = 96228000.

The previous prime is 398216201. The next prime is 398216251. The reversal of 398216250 is 52612893.

398216250 is a `hidden beast` number, since 3 + 9 + 8 + 21 + 625 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (398216251) by changing a digit.

It is a polite number, since it can be written in 139 ways as a sum of consecutive naturals, for example, 17313739 + ... + 17313761.

Almost surely, 2^398216250 is an apocalyptic number.

398216250 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 398216250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (614615760).

398216250 is an abundant number, since it is smaller than the sum of its proper divisors (831015270).

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

398216250 is an equidigital number, since it uses as much as digits as its factorization.

398216250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 398216250 is about 19955.3564237776. The cubic root of 398216250 is about 735.7094358019.

The spelling of 398216250 in words is "three hundred ninety-eight million, two hundred sixteen thousand, two hundred fifty".