261235364 has 48 divisors (see below), whose sum is σ = 514382400. Its totient is φ = 115253376.

The previous prime is 261235327. The next prime is 261235369. The reversal of 261235364 is 463532162.

261235364 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 261235364.

It is not an unprimeable number, because it can be changed into a prime (261235369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160547 + ... + 162165.

It is an arithmetic number, because the mean of its divisors is an integer number (10716300).

Almost surely, 2^261235364 is an apocalyptic number.

It is an amenable number.

261235364 is a deficient number, since it is larger than the sum of its proper divisors (253147036).

261235364 is a wasteful number, since it uses less digits than its factorization.

261235364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772 (or 1770 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 261235364 is about 16162.7771128603. Note that the first 3 decimals coincide. The cubic root of 261235364 is about 639.2596941279.

The spelling of 261235364 in words is "two hundred sixty-one million, two hundred thirty-five thousand, three hundred sixty-four".