1262403648 has 252 divisors, whose sum is σ = 4057893840. Its totient is φ = 374837760.

The previous prime is 1262403641. The next prime is 1262403713. The reversal of 1262403648 is 8463042621.

1262403648 is a `hidden beast` number, since 1 + 2 + 6 + 2 + 4 + 0 + 3 + 648 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1262403641) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4111911 + ... + 4112217.

Almost surely, 2^1262403648 is an apocalyptic number.

1262403648 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 1262403648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2028946920).

1262403648 is an abundant number, since it is smaller than the sum of its proper divisors (2795490192).

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

1262403648 is a wasteful number, since it uses less digits than its factorization.

1262403648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 382 counting only the distinct ones).

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

The square root of 1262403648 is about 35530.3201223969. The cubic root of 1262403648 is about 1080.7686708893.

The spelling of 1262403648 in words is "one billion, two hundred sixty-two million, four hundred three thousand, six hundred forty-eight".