265238478 has 12 divisors (see below), whose sum is σ = 574683408. Its totient is φ = 88412820.

The previous prime is 265238383. The next prime is 265238489. The reversal of 265238478 is 874832562.

265238478 is a `hidden beast` number, since 265 + 2 + 384 + 7 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7367718 + ... + 7367753.

It is an arithmetic number, because the mean of its divisors is an integer number (47890284).

Almost surely, 2^265238478 is an apocalyptic number.

265238478 is an abundant number, since it is smaller than the sum of its proper divisors (309444930).

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

265238478 is a wasteful number, since it uses less digits than its factorization.

265238478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14735479 (or 14735476 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 265238478 is about 16286.1437424579. The cubic root of 265238478 is about 642.5084480612.

The spelling of 265238478 in words is "two hundred sixty-five million, two hundred thirty-eight thousand, four hundred seventy-eight".