262561878 has 64 divisors (see below), whose sum is σ = 611543040. Its totient is φ = 83397600.

The previous prime is 262561861. The next prime is 262561883. The reversal of 262561878 is 878165262.

262561878 is a `hidden beast` number, since 2 + 6 + 2 + 561 + 87 + 8 = 666.

262561878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110988 + ... + 113328.

It is an arithmetic number, because the mean of its divisors is an integer number (9555360).

Almost surely, 2^262561878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 262561878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305771520).

262561878 is an abundant number, since it is smaller than the sum of its proper divisors (348981162).

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

262561878 is a wasteful number, since it uses less digits than its factorization.

262561878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450 (or 2444 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 262561878 is about 16203.7612300355. The cubic root of 262561878 is about 640.3398894475.

The spelling of 262561878 in words is "two hundred sixty-two million, five hundred sixty-one thousand, eight hundred seventy-eight".