2729840478 has 8 divisors (see below), whose sum is σ = 5459680968. Its totient is φ = 909946824.

The previous prime is 2729840471. The next prime is 2729840479. The reversal of 2729840478 is 8740489272.

It is a sphenic number, since it is the product of 3 distinct primes.

2729840478 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 2729840478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2729840471) 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 3 ways as a sum of consecutive naturals, for example, 227486701 + ... + 227486712.

It is an arithmetic number, because the mean of its divisors is an integer number (682460121).

Almost surely, 2^2729840478 is an apocalyptic number.

2729840478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2729840478 is a wasteful number, since it uses less digits than its factorization.

2729840478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454973418.

The product of its (nonzero) digits is 1806336, while the sum is 51.

The square root of 2729840478 is about 52247.8753443621. The cubic root of 2729840478 is about 1397.5877640700.

It can be divided in two parts, 27298 and 40478, that added together give a palindrome (67776).

The spelling of 2729840478 in words is "two billion, seven hundred twenty-nine million, eight hundred forty thousand, four hundred seventy-eight".