261347058 has 96 divisors (see below), whose sum is σ = 676266240. Its totient is φ = 71383680.

The previous prime is 261347057. The next prime is 261347059. The reversal of 261347058 is 850743162.

261347058 is a `hidden beast` number, since 261 + 347 + 0 + 58 = 666.

It is an interprime number because it is at equal distance from previous prime (261347057) and next prime (261347059).

It is not an unprimeable number, because it can be changed into a prime (261347057) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 283923 + ... + 284841.

It is an arithmetic number, because the mean of its divisors is an integer number (7044440).

Almost surely, 2^261347058 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261347058, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338133120).

261347058 is an abundant number, since it is smaller than the sum of its proper divisors (414919182).

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

261347058 is a wasteful number, since it uses less digits than its factorization.

261347058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 261347058 is about 16166.2320285217. The cubic root of 261347058 is about 639.3507886074.

The spelling of 261347058 in words is "two hundred sixty-one million, three hundred forty-seven thousand, fifty-eight".