261367870 has 16 divisors (see below), whose sum is σ = 474627600. Its totient is φ = 103621504.

The previous prime is 261367867. The next prime is 261367919. The reversal of 261367870 is 78763162.

261367870 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 7 ways as a sum of consecutive naturals, for example, 114520 + ... + 116779.

It is an arithmetic number, because the mean of its divisors is an integer number (29664225).

Almost surely, 2^261367870 is an apocalyptic number.

261367870 is a deficient number, since it is larger than the sum of its proper divisors (213259730).

261367870 is a wasteful number, since it uses less digits than its factorization.

261367870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231419.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 261367870 is about 16166.8757031159. The cubic root of 261367870 is about 639.3677594195.

The spelling of 261367870 in words is "two hundred sixty-one million, three hundred sixty-seven thousand, eight hundred seventy".