1428718730 has 16 divisors (see below), whose sum is σ = 2597157864. Its totient is φ = 565828800.

The previous prime is 1428718693. The next prime is 1428718763. The reversal of 1428718730 is 378178241.

It can be written as a sum of positive squares in 4 ways, for example, as 1206798121 + 221920609 = 34739^2 + 14897^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706277 + ... + 708296.

Almost surely, 2^1428718730 is an apocalyptic number.

1428718730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1428718730 is a deficient number, since it is larger than the sum of its proper divisors (1168439134).

1428718730 is a wasteful number, since it uses less digits than its factorization.

1428718730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414681.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 1428718730 is about 37798.3958654332. The cubic root of 1428718730 is about 1126.2865886283.

The spelling of 1428718730 in words is "one billion, four hundred twenty-eight million, seven hundred eighteen thousand, seven hundred thirty".