261296394 has 8 divisors (see below), whose sum is σ = 522592800. Its totient is φ = 87098796.

The previous prime is 261296389. The next prime is 261296407. The reversal of 261296394 is 493692162.

It is a sphenic number, since it is the product of 3 distinct primes.

261296394 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21774694 + ... + 21774705.

It is an arithmetic number, because the mean of its divisors is an integer number (65324100).

Almost surely, 2^261296394 is an apocalyptic number.

261296394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

261296394 is a wasteful number, since it uses less digits than its factorization.

261296394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43549404.

The product of its digits is 139968, while the sum is 42.

The square root of 261296394 is about 16164.6649826094. The cubic root of 261296394 is about 639.3094716935.

It can be divided in two parts, 26129 and 6394, that added together give a palindrome (32523).

The spelling of 261296394 in words is "two hundred sixty-one million, two hundred ninety-six thousand, three hundred ninety-four".