1284490812 has 24 divisors (see below), whose sum is σ = 3269613312. Its totient is φ = 389239600.

The previous prime is 1284490807. The next prime is 1284490873. The reversal of 1284490812 is 2180944821.

It is a super-2 number, since 2×1284490812² = 3299833292224838688, which contains 22 as substring.

It is a congruent number.

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, 4865364 + ... + 4865627.

It is an arithmetic number, because the mean of its divisors is an integer number (136233888).

Almost surely, 2^1284490812 is an apocalyptic number.

1284490812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1284490812 is an abundant number, since it is smaller than the sum of its proper divisors (1985122500).

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

1284490812 is a wasteful number, since it uses less digits than its factorization.

1284490812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9731009 (or 9731007 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 1284490812 is about 35839.7936936026. The cubic root of 1284490812 is about 1087.0353498681.

The spelling of 1284490812 in words is "one billion, two hundred eighty-four million, four hundred ninety thousand, eight hundred twelve".