261407480 has 16 divisors (see below), whose sum is σ = 588166920. Its totient is φ = 104562976.

The previous prime is 261407459. The next prime is 261407519. The reversal of 261407480 is 84704162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3267554 + ... + 3267633.

Almost surely, 2^261407480 is an apocalyptic number.

261407480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261407480 is an abundant number, since it is smaller than the sum of its proper divisors (326759440).

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

261407480 is a wasteful number, since it uses less digits than its factorization.

261407480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6535198 (or 6535194 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 261407480 is about 16168.1006924128. The cubic root of 261407480 is about 639.4000562708.

The spelling of 261407480 in words is "two hundred sixty-one million, four hundred seven thousand, four hundred eighty".