398797056 has 216 divisors, whose sum is σ = 1334977280. Its totient is φ = 112140288.

The previous prime is 398797039. The next prime is 398797057. The reversal of 398797056 is 650797893.

It is a junction number, because it is equal to n+sod(n) for n = 398796993 and 398797011.

It is not an unprimeable number, because it can be changed into a prime (398797057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1273956 + ... + 1274268.

Almost surely, 2^398797056 is an apocalyptic number.

398797056 is a gapful number since it is divisible by the number (36) 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 398797056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667488640).

398797056 is an abundant number, since it is smaller than the sum of its proper divisors (936180224).

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

398797056 is a wasteful number, since it uses less digits than its factorization.

398797056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 398797056 is about 19969.9037554015. The cubic root of 398797056 is about 736.0669441313.

The spelling of 398797056 in words is "three hundred ninety-eight million, seven hundred ninety-seven thousand, fifty-six".