1047287808 has 144 divisors (see below), whose sum is σ = 3457293840. Its totient is φ = 299188224.

The previous prime is 1047287803. The next prime is 1047287821. The reversal of 1047287808 is 8087827401.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047287803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124966 + ... + 133082.

It is an arithmetic number, because the mean of its divisors is an integer number (24008985).

Almost surely, 2^1047287808 is an apocalyptic number.

1047287808 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 1047287808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1728646920).

1047287808 is an abundant number, since it is smaller than the sum of its proper divisors (2410006032).

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

1047287808 is an equidigital number, since it uses as much as digits as its factorization.

1047287808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8152 (or 8129 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 1047287808 is about 32361.8264008693. The cubic root of 1047287808 is about 1015.5204714172.

The spelling of 1047287808 in words is "one billion, forty-seven million, two hundred eighty-seven thousand, eight hundred eight".