1248221808 has 30 divisors (see below), whose sum is σ = 3493287824. Its totient is φ = 416073888.

The previous prime is 1248221803. The next prime is 1248221827. The reversal of 1248221808 is 8081228421.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248221801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4333960 + ... + 4334247.

Almost surely, 2^1248221808 is an apocalyptic number.

1248221808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1248221808 is an abundant number, since it is smaller than the sum of its proper divisors (2245066016).

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

1248221808 is a wasteful number, since it uses less digits than its factorization.

1248221808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8668221 (or 8668212 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The square root of 1248221808 is about 35330.1826771388. The cubic root of 1248221808 is about 1076.7063028069.

The spelling of 1248221808 in words is "one billion, two hundred forty-eight million, two hundred twenty-one thousand, eight hundred eight".