1428206645776 has 45 divisors (see below), whose sum is σ = 2793789241383. Its totient is φ = 707293779840.

The previous prime is 1428206645771. The next prime is 1428206645777. The reversal of 1428206645776 is 6775466028241.

The square root of 1428206645776 is 1195076.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 86044176 + 1428120601600 = 9276^2 + 1195040^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1428206645776.

It is not an unprimeable number, because it can be changed into a prime (1428206645771) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 521051766 + ... + 521054506.

Almost surely, 2^{1428206645776} is an apocalyptic number.

1428206645776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1428206645776 is the 1195076-th square number.

It is an amenable number.

1428206645776 is a deficient number, since it is larger than the sum of its proper divisors (1365582595607).

1428206645776 is an frugal number, since it uses more digits than its factorization.

1428206645776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5708 (or 2852 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 58.

The spelling of 1428206645776 in words is "one trillion, four hundred twenty-eight billion, two hundred six million, six hundred forty-five thousand, seven hundred seventy-six".