261892994 has 16 divisors (see below), whose sum is σ = 439006176. Its totient is φ = 116138400.

The previous prime is 261892987. The next prime is 261892999. The reversal of 261892994 is 499298162.

It is a happy number.

261892994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261892999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144272 + ... + 146075.

It is an arithmetic number, because the mean of its divisors is an integer number (27437886).

Almost surely, 2^261892994 is an apocalyptic number.

261892994 is a deficient number, since it is larger than the sum of its proper divisors (177113182).

261892994 is a wasteful number, since it uses less digits than its factorization.

261892994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290401.

The product of its digits is 559872, while the sum is 50.

The square root of 261892994 is about 16183.1082922905. The cubic root of 261892994 is about 639.7956655628.

The spelling of 261892994 in words is "two hundred sixty-one million, eight hundred ninety-two thousand, nine hundred ninety-four".