261038328 has 32 divisors (see below), whose sum is σ = 653788800. Its totient is φ = 86853728.

The previous prime is 261038299. The next prime is 261038333. The reversal of 261038328 is 823830162.

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, 3853 + ... + 23171.

It is an arithmetic number, because the mean of its divisors is an integer number (20430900).

Almost surely, 2^261038328 is an apocalyptic number.

It is an amenable number.

261038328 is an abundant number, since it is smaller than the sum of its proper divisors (392750472).

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

261038328 is a wasteful number, since it uses less digits than its factorization.

261038328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19891 (or 19887 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 261038328 is about 16156.6805996776. The cubic root of 261038328 is about 639.0989337928.

The spelling of 261038328 in words is "two hundred sixty-one million, thirty-eight thousand, three hundred twenty-eight".