1428839668 has 24 divisors (see below), whose sum is σ = 2615969664. Its totient is φ = 682161600.

The previous prime is 1428839623. The next prime is 1428839677. The reversal of 1428839668 is 8669388241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84978 + ... + 100393.

It is an arithmetic number, because the mean of its divisors is an integer number (108998736).

Almost surely, 2^1428839668 is an apocalyptic number.

It is an amenable number.

1428839668 is a deficient number, since it is larger than the sum of its proper divisors (1187129996).

1428839668 is a wasteful number, since it uses less digits than its factorization.

1428839668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185463 (or 185461 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 55.

The square root of 1428839668 is about 37799.9956084654. The cubic root of 1428839668 is about 1126.3183669859.

It can be divided in two parts, 14288 and 39668, that added together give a triangular number (53956 = T₃₂₈).

The spelling of 1428839668 in words is "one billion, four hundred twenty-eight million, eight hundred thirty-nine thousand, six hundred sixty-eight".