261203080 has 32 divisors (see below), whose sum is σ = 598800600. Its totient is φ = 102509056.

The previous prime is 261203009. The next prime is 261203119. The reversal of 261203080 is 80302162.

It can be written as a sum of positive squares in 4 ways, for example, as 235254244 + 25948836 = 15338^2 + 5094^2 .

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, 59485 + ... + 63724.

Almost surely, 2^261203080 is an apocalyptic number.

261203080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261203080 is an abundant number, since it is smaller than the sum of its proper divisors (337597520).

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

261203080 is a wasteful number, since it uses less digits than its factorization.

261203080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123273 (or 123269 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 261203080 is about 16161.7783674941. The cubic root of 261203080 is about 639.2333593700.

The spelling of 261203080 in words is "two hundred sixty-one million, two hundred three thousand, eighty".