256910000 has 100 divisors (see below), whose sum is σ = 649629552. Its totient is φ = 98208000.

The previous prime is 256909997. The next prime is 256910009. The reversal of 256910000 is 19652.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (256910009) 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 19 ways as a sum of consecutive naturals, for example, 229442 + ... + 230558.

Almost surely, 2^256910000 is an apocalyptic number.

256910000 is a gapful number since it is divisible by the number (20) 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 256910000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324814776).

256910000 is an abundant number, since it is smaller than the sum of its proper divisors (392719552).

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

256910000 is a wasteful number, since it uses less digits than its factorization.

256910000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168 (or 1147 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 256910000 is about 16028.4122732103. The cubic root of 256910000 is about 635.7118930300.

Adding to 256910000 its reverse (19652), we get a palindrome (256929652).

The spelling of 256910000 in words is "two hundred fifty-six million, nine hundred ten thousand".