261478024 has 8 divisors (see below), whose sum is σ = 490271310. Its totient is φ = 130739008.

The previous prime is 261477989. The next prime is 261478067. The reversal of 261478024 is 420874162.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 243921924 + 17556100 = 15618^2 + 4190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16342369 + ... + 16342384.

Almost surely, 2^261478024 is an apocalyptic number.

It is an amenable number.

261478024 is a deficient number, since it is larger than the sum of its proper divisors (228793286).

261478024 is a wasteful number, since it uses less digits than its factorization.

261478024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32684759 (or 32684755 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 261478024 is about 16170.2821249352. The cubic root of 261478024 is about 639.4575677349.

The spelling of 261478024 in words is "two hundred sixty-one million, four hundred seventy-eight thousand, twenty-four".