262428660 has 240 divisors, whose sum is σ = 940007376. Its totient is φ = 60715008.

The previous prime is 262428629. The next prime is 262428701. The reversal of 262428660 is 66824262.

262428660 is a `hidden beast` number, since 2 + 624 + 28 + 6 + 6 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 10381284 + 252047376 = 3222^2 + 15876^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 357654 + ... + 358386.

Almost surely, 2^262428660 is an apocalyptic number.

262428660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 262428660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470003688).

262428660 is an abundant number, since it is smaller than the sum of its proper divisors (677578716).

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

262428660 is a wasteful number, since it uses less digits than its factorization.

262428660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 262428660 is about 16199.6499962191. The cubic root of 262428660 is about 640.2315731002.

The spelling of 262428660 in words is "two hundred sixty-two million, four hundred twenty-eight thousand, six hundred sixty".