1288491234 has 32 divisors (see below), whose sum is σ = 2847208320. Its totient is φ = 386656512.

The previous prime is 1288491221. The next prime is 1288491287. The reversal of 1288491234 is 4321948821.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272269 + ... + 276960.

It is an arithmetic number, because the mean of its divisors is an integer number (88975260).

Almost surely, 2^1288491234 is an apocalyptic number.

1288491234 is an abundant number, since it is smaller than the sum of its proper divisors (1558717086).

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

1288491234 is a wasteful number, since it uses less digits than its factorization.

1288491234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549274.

The product of its digits is 110592, while the sum is 42.

The square root of 1288491234 is about 35895.5600875651. The cubic root of 1288491234 is about 1088.1626690755.

The spelling of 1288491234 in words is "one billion, two hundred eighty-eight million, four hundred ninety-one thousand, two hundred thirty-four".