1288880429 has 4 divisors (see below), whose sum is σ = 1310725920. Its totient is φ = 1267034940.

The previous prime is 1288880423. The next prime is 1288880431. The reversal of 1288880429 is 9240888821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1288880429 - 2²⁴ = 1272103213 is a prime.

It is a super-2 number, since 2×1288880429² = 3322425520518448082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288880423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10922657 + ... + 10922774.

It is an arithmetic number, because the mean of its divisors is an integer number (327681480).

Almost surely, 2^1288880429 is an apocalyptic number.

It is an amenable number.

1288880429 is a deficient number, since it is larger than the sum of its proper divisors (21845491).

1288880429 is an equidigital number, since it uses as much as digits as its factorization.

1288880429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21845490.

The product of its (nonzero) digits is 589824, while the sum is 50.

The square root of 1288880429 is about 35900.9808918921. The cubic root of 1288880429 is about 1088.2722196426.

The spelling of 1288880429 in words is "one billion, two hundred eighty-eight million, eight hundred eighty thousand, four hundred twenty-nine".