262644640 has 48 divisors (see below), whose sum is σ = 622635552. Its totient is φ = 104696064.

The previous prime is 262644637. The next prime is 262644653. The reversal of 262644640 is 46446262.

It is a junction number, because it is equal to n+sod(n) for n = 262644596 and 262644605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46447 + ... + 51793.

It is an arithmetic number, because the mean of its divisors is an integer number (12971574).

Almost surely, 2^262644640 is an apocalyptic number.

262644640 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 262644640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311317776).

262644640 is an abundant number, since it is smaller than the sum of its proper divisors (359990912).

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

262644640 is a wasteful number, since it uses less digits than its factorization.

262644640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669 (or 5661 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 262644640 is about 16206.3148186131. The cubic root of 262644640 is about 640.4071627864.

The spelling of 262644640 in words is "two hundred sixty-two million, six hundred forty-four thousand, six hundred forty".