398847240 has 480 divisors, whose sum is σ = 1593250560. Its totient is φ = 88646400.

The previous prime is 398847227. The next prime is 398847247. The reversal of 398847240 is 42748893.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (398847247) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 12866025 + ... + 12866055.

It is an arithmetic number, because the mean of its divisors is an integer number (3319272).

Almost surely, 2^398847240 is an apocalyptic number.

398847240 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 398847240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796625280).

398847240 is an abundant number, since it is smaller than the sum of its proper divisors (1194403320).

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

398847240 is a wasteful number, since it uses less digits than its factorization.

398847240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 398847240 is about 19971.1602066580. The cubic root of 398847240 is about 736.0978180087.

The spelling of 398847240 in words is "three hundred ninety-eight million, eight hundred forty-seven thousand, two hundred forty".