260438565420 has 72 divisors (see below), whose sum is σ = 861814895760. Its totient is φ = 63136621440.

The previous prime is 260438565391. The next prime is 260438565427. The reversal of 260438565420 is 24565834062.

260438565420 is a `hidden beast` number, since 2 + 6 + 0 + 43 + 8 + 565 + 42 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (260438565427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65765335 + ... + 65769294.

It is an arithmetic number, because the mean of its divisors is an integer number (11969651330).

Almost surely, 2^260438565420 is an apocalyptic number.

260438565420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260438565420 is an abundant number, since it is smaller than the sum of its proper divisors (601376330340).

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

260438565420 is a wasteful number, since it uses less digits than its factorization.

260438565420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131534655 (or 131534650 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 260438565420 in words is "two hundred sixty billion, four hundred thirty-eight million, five hundred sixty-five thousand, four hundred twenty".