1287428830 has 32 divisors (see below), whose sum is σ = 2364129504. Its totient is φ = 504606336.

The previous prime is 1287428797. The next prime is 1287428873. The reversal of 1287428830 is 388247821.

It is a congruent number.

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, 790477 + ... + 792103.

It is an arithmetic number, because the mean of its divisors is an integer number (73879047).

Almost surely, 2^1287428830 is an apocalyptic number.

1287428830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1287428830 is a deficient number, since it is larger than the sum of its proper divisors (1076700674).

1287428830 is a wasteful number, since it uses less digits than its factorization.

1287428830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 1287428830 is about 35880.7584925403. The cubic root of 1287428830 is about 1087.8635113665.

The spelling of 1287428830 in words is "one billion, two hundred eighty-seven million, four hundred twenty-eight thousand, eight hundred thirty".