261794460 has 48 divisors (see below), whose sum is σ = 743976576. Its totient is φ = 68768832.

The previous prime is 261794453. The next prime is 261794503. The reversal of 261794460 is 64497162.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28542 + ... + 36581.

It is an arithmetic number, because the mean of its divisors is an integer number (15499512).

Almost surely, 2^261794460 is an apocalyptic number.

261794460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261794460 is an abundant number, since it is smaller than the sum of its proper divisors (482182116).

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

261794460 is a wasteful number, since it uses less digits than its factorization.

261794460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65202 (or 65200 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 261794460 is about 16180.0636587128. The cubic root of 261794460 is about 639.7154170957.

The spelling of 261794460 in words is "two hundred sixty-one million, seven hundred ninety-four thousand, four hundred sixty".