1262223648 has 144 divisors (see below), whose sum is σ = 4254344640. Its totient is φ = 360619776.

The previous prime is 1262223631. The next prime is 1262223649. The reversal of 1262223648 is 8463222621.

1262223648 is a `hidden beast` number, since 1 + 2 + 6 + 2 + 2 + 2 + 3 + 648 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1262223649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42838 + ... + 66026.

It is an arithmetic number, because the mean of its divisors is an integer number (29544060).

Almost surely, 2^1262223648 is an apocalyptic number.

1262223648 is a gapful number since it is divisible by the number (18) 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 1262223648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2127172320).

1262223648 is an abundant number, since it is smaller than the sum of its proper divisors (2992120992).

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

1262223648 is an equidigital number, since it uses as much as digits as its factorization.

1262223648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23221 (or 23201 counting only the distinct ones).

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

The square root of 1262223648 is about 35527.7869842747. The cubic root of 1262223648 is about 1080.7173012639.

The spelling of 1262223648 in words is "one billion, two hundred sixty-two million, two hundred twenty-three thousand, six hundred forty-eight".