1288881830 has 8 divisors (see below), whose sum is σ = 2319987312. Its totient is φ = 515552728.

The previous prime is 1288881821. The next prime is 1288881859. The reversal of 1288881830 is 381888821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1288881830³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64444082 + ... + 64444101.

It is an arithmetic number, because the mean of its divisors is an integer number (289998414).

Almost surely, 2^1288881830 is an apocalyptic number.

1288881830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1288881830 is a deficient number, since it is larger than the sum of its proper divisors (1031105482).

1288881830 is a wasteful number, since it uses less digits than its factorization.

1288881830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128888190.

The product of its (nonzero) digits is 196608, while the sum is 47.

The square root of 1288881830 is about 35901.0004038885. Note that the first 3 decimals coincide. The cubic root of 1288881830 is about 1088.2726139561.

The spelling of 1288881830 in words is "one billion, two hundred eighty-eight million, eight hundred eighty-one thousand, eight hundred thirty".