398355239040 has 512 divisors, whose sum is σ = 1502499559680. Its totient is φ = 88670208000.

The previous prime is 398355239039. The next prime is 398355239053. The reversal of 398355239040 is 40932553893.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14707110 + ... + 14734170.

Almost surely, 2^398355239040 is an apocalyptic number.

398355239040 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 398355239040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (751249779840).

398355239040 is an abundant number, since it is smaller than the sum of its proper divisors (1104144320640).

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

398355239040 is a wasteful number, since it uses less digits than its factorization.

398355239040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27152 (or 27140 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 51.

The spelling of 398355239040 in words is "three hundred ninety-eight billion, three hundred fifty-five million, two hundred thirty-nine thousand, forty".