1283531872 has 36 divisors (see below), whose sum is σ = 2939520780. Its totient is φ = 550084416.

The previous prime is 1283531831. The next prime is 1283531903. The reversal of 1283531872 is 2781353821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 407722 + ... + 410857.

It is an arithmetic number, because the mean of its divisors is an integer number (81653355).

Almost surely, 2^1283531872 is an apocalyptic number.

It is an amenable number.

1283531872 is an abundant number, since it is smaller than the sum of its proper divisors (1655988908).

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

1283531872 is an equidigital number, since it uses as much as digits as its factorization.

1283531872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818603 (or 818588 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 1283531872 is about 35826.4130495923. The cubic root of 1283531872 is about 1086.7647728221.

The spelling of 1283531872 in words is "one billion, two hundred eighty-three million, five hundred thirty-one thousand, eight hundred seventy-two".