1428715730 has 16 divisors (see below), whose sum is σ = 2769510744. Its totient is φ = 527525760.

The previous prime is 1428715727. The next prime is 1428715733. The reversal of 1428715730 is 375178241.

It is an interprime number because it is at equal distance from previous prime (1428715727) and next prime (1428715733).

It can be written as a sum of positive squares in 4 ways, for example, as 977875441 + 450840289 = 31271^2 + 21233^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1428715733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5494931 + ... + 5495190.

Almost surely, 2^1428715730 is an apocalyptic number.

1428715730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1428715730 is a deficient number, since it is larger than the sum of its proper divisors (1340795014).

1428715730 is a wasteful number, since it uses less digits than its factorization.

1428715730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10990141.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 1428715730 is about 37798.3561811886. The cubic root of 1428715730 is about 1126.2858003084.

The spelling of 1428715730 in words is "one billion, four hundred twenty-eight million, seven hundred fifteen thousand, seven hundred thirty".