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2720000057 = 3947689131
BaseRepresentation
bin1010001000011111…
…1110100000111001
321000120011022121212
42202013332200321
521032310000212
61125523012505
7124255422215
oct24207764071
97016138555
102720000057
111176407335
1263ab0a135
13344699bb8
141bb35b945
1510dbd5e22
hexa21fe839

2720000057 has 4 divisors (see below), whose sum is σ = 2720693136. Its totient is φ = 2719306980.

The previous prime is 2720000011. The next prime is 2720000069. The reversal of 2720000057 is 7500000272.

2720000057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2720000057 - 210 = 2719999033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2719999987 and 2720000041.

It is not an unprimeable number, because it can be changed into a prime (2720000957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340619 + ... + 348512.

It is an arithmetic number, because the mean of its divisors is an integer number (680173284).

Almost surely, 22720000057 is an apocalyptic number.

It is an amenable number.

2720000057 is a deficient number, since it is larger than the sum of its proper divisors (693079).

2720000057 is an equidigital number, since it uses as much as digits as its factorization.

2720000057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693078.

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 2720000057 is about 52153.6197880837. The cubic root of 2720000057 is about 1395.9064191326.

The spelling of 2720000057 in words is "two billion, seven hundred twenty million, fifty-seven", and thus it is an aban number.

Divisors: 1 3947 689131 2720000057