2749728957 has 8 divisors (see below), whose sum is σ = 3668876640. Its totient is φ = 1831866960.

The previous prime is 2749728941. The next prime is 2749729007. The reversal of 2749728957 is 7598279472.

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

It is not a de Polignac number, because 2749728957 - 2⁴ = 2749728941 is a prime.

It is a super-2 number, since 2×2749728957² = 15122018673928615698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2749728957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2749728557) 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 7 ways as a sum of consecutive naturals, for example, 316419 + ... + 324992.

It is an arithmetic number, because the mean of its divisors is an integer number (458609580).

Almost surely, 2^2749728957 is an apocalyptic number.

It is an amenable number.

2749728957 is a deficient number, since it is larger than the sum of its proper divisors (919147683).

2749728957 is a wasteful number, since it uses less digits than its factorization.

2749728957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642843.

The product of its digits is 17781120, while the sum is 60.

The square root of 2749728957 is about 52437.8580512210. The cubic root of 2749728957 is about 1400.9736351399.

It can be divided in two parts, 2749728 and 957, that added together give a triangular number (2750685 = T₂₃₄₅).

The spelling of 2749728957 in words is "two billion, seven hundred forty-nine million, seven hundred twenty-eight thousand, nine hundred fifty-seven".