261436230 has 72 divisors (see below), whose sum is σ = 747176976. Its totient is φ = 63375840.

The previous prime is 261436229. The next prime is 261436267. The reversal of 261436230 is 32634162.

261436230 is a `hidden beast` number, since 26 + 14 + 3 + 623 + 0 = 666.

It is a super-2 number, since 2×261436230² = 136697804713225800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261436194 and 261436203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1114 + ... + 22893.

It is an arithmetic number, because the mean of its divisors is an integer number (10377458).

Almost surely, 2^261436230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261436230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373588488).

261436230 is an abundant number, since it is smaller than the sum of its proper divisors (485740746).

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

261436230 is a wasteful number, since it uses less digits than its factorization.

261436230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24042 (or 24028 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 261436230 is about 16168.9897643607. The cubic root of 261436230 is about 639.4234961481.

The spelling of 261436230 in words is "two hundred sixty-one million, four hundred thirty-six thousand, two hundred thirty".