10256778 has 72 divisors (see below), whose sum is σ = 26809380. Its totient is φ = 2822400.

The previous prime is 10256777. The next prime is 10256783. The reversal of 10256778 is 87765201.

It can be written as a sum of positive squares in 2 ways, for example, as 9018009 + 1238769 = 3003^2 + 1113^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10256773) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25378 + ... + 25778.

Almost surely, 2^10256778 is an apocalyptic number.

10256778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10256778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13404690).

10256778 is an abundant number, since it is smaller than the sum of its proper divisors (16552602).

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

10256778 is a wasteful number, since it uses less digits than its factorization.

10256778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 10256778 is about 3202.6204895367. The cubic root of 10256778 is about 217.2719448691.

The spelling of 10256778 in words is "ten million, two hundred fifty-six thousand, seven hundred seventy-eight".