2729306391 has 16 divisors (see below), whose sum is σ = 4237415424. Its totient is φ = 1530176544.

The previous prime is 2729306389. The next prime is 2729306399. The reversal of 2729306391 is 1936039272.

It is not a de Polignac number, because 2729306391 - 2¹ = 2729306389 is a prime.

It is a super-2 number, since 2×2729306391² = 14898226751906889762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2729306399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1224991 + ... + 1227216.

It is an arithmetic number, because the mean of its divisors is an integer number (264838464).

Almost surely, 2^2729306391 is an apocalyptic number.

2729306391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2729306391 is a deficient number, since it is larger than the sum of its proper divisors (1508109033).

2729306391 is a wasteful number, since it uses less digits than its factorization.

2729306391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452270.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 2729306391 is about 52242.7640061282. The cubic root of 2729306391 is about 1397.4966131832.

The spelling of 2729306391 in words is "two billion, seven hundred twenty-nine million, three hundred six thousand, three hundred ninety-one".