1428919990 has 8 divisors (see below), whose sum is σ = 2572056000. Its totient is φ = 571567992.

The previous prime is 1428919963. The next prime is 1428920021. The reversal of 1428919990 is 999198241.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71445990 + ... + 71446009.

It is an arithmetic number, because the mean of its divisors is an integer number (321507000).

Almost surely, 2^1428919990 is an apocalyptic number.

1428919990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1428919990 is a deficient number, since it is larger than the sum of its proper divisors (1143136010).

1428919990 is a wasteful number, since it uses less digits than its factorization.

1428919990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142892006.

The product of its (nonzero) digits is 419904, while the sum is 52.

The square root of 1428919990 is about 37801.0580539752. The cubic root of 1428919990 is about 1126.3394718612.

It can be divided in two parts, 142891 and 9990, that added together give a square (152881 = 391²).

The spelling of 1428919990 in words is "one billion, four hundred twenty-eight million, nine hundred nineteen thousand, nine hundred ninety".