256378698 has 48 divisors (see below), whose sum is σ = 572715936. Its totient is φ = 82827360.

The previous prime is 256378693. The next prime is 256378739. The reversal of 256378698 is 896873652.

It is a happy number.

256378698 is a `hidden beast` number, since 2 + 563 + 78 + 6 + 9 + 8 = 666.

It is a super-3 number, since 3×256378698³ (a number of 26 digits) contains 333 as substring.

Its product of digits (4354560) is a multiple of the sum of its prime divisors (1536).

It is not an unprimeable number, because it can be changed into a prime (256378693) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 219865 + ... + 221027.

It is an arithmetic number, because the mean of its divisors is an integer number (11931582).

Almost surely, 2^256378698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256378698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286357968).

256378698 is an abundant number, since it is smaller than the sum of its proper divisors (316337238).

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

256378698 is a wasteful number, since it uses less digits than its factorization.

256378698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539 (or 1536 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 256378698 is about 16011.8299391419. The cubic root of 256378698 is about 635.2733631957.

The spelling of 256378698 in words is "two hundred fifty-six million, three hundred seventy-eight thousand, six hundred ninety-eight".