2729730685428 has 36 divisors (see below), whose sum is σ = 6916542515428. Its totient is φ = 907748916480.

The previous prime is 2729730685399. The next prime is 2729730685439. The reversal of 2729730685428 is 8245860379272.

2729730685428 is a `hidden beast` number, since 2 + 7 + 29 + 7 + 3 + 0 + 68 + 542 + 8 = 666.

2729730685428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1075862668644 + 1653868016784 = 1037238^2 + 1286028^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×2729730685428² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90039301 + ... + 90069612.

Almost surely, 2^{2729730685428} is an apocalyptic number.

It is an amenable number.

2729730685428 is an abundant number, since it is smaller than the sum of its proper divisors (4186811830000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2729730685428 is a wasteful number, since it uses less digits than its factorization.

2729730685428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180109344 (or 180109339 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 63.

The spelling of 2729730685428 in words is "two trillion, seven hundred twenty-nine billion, seven hundred thirty million, six hundred eighty-five thousand, four hundred twenty-eight".