398280840750 has 512 divisors, whose sum is σ = 1265009840640. Its totient is φ = 91868774400.

The previous prime is 398280840721. The next prime is 398280840781. The reversal of 398280840750 is 57048082893.

It is a happy number.

398280840750 is a `hidden beast` number, since 39 + 82 + 80 + 8 + 407 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 466917324 + ... + 466918176.

It is an arithmetic number, because the mean of its divisors is an integer number (2470722345).

Almost surely, 2^398280840750 is an apocalyptic number.

398280840750 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 398280840750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (632504920320).

398280840750 is an abundant number, since it is smaller than the sum of its proper divisors (866728999890).

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

398280840750 is a wasteful number, since it uses less digits than its factorization.

398280840750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 398280840750 in words is "three hundred ninety-eight billion, two hundred eighty million, eight hundred forty thousand, seven hundred fifty".