398074656 has 96 divisors (see below), whose sum is σ = 1202439168. Its totient is φ = 112953600.

The previous prime is 398074603. The next prime is 398074657. The reversal of 398074656 is 656470893.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (398074657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99511 + ... + 103433.

It is an arithmetic number, because the mean of its divisors is an integer number (12525408).

Almost surely, 2^398074656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398074656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (601219584).

398074656 is an abundant number, since it is smaller than the sum of its proper divisors (804364512).

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

398074656 is a wasteful number, since it uses less digits than its factorization.

398074656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4094 (or 4086 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 398074656 is about 19951.8083390955. The cubic root of 398074656 is about 735.6222265774.

The spelling of 398074656 in words is "three hundred ninety-eight million, seventy-four thousand, six hundred fifty-six".