2720518 has 4 divisors (see below), whose sum is σ = 4080780. Its totient is φ = 1360258.

The previous prime is 2720513. The next prime is 2720551. The reversal of 2720518 is 8150272.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 2720492 and 2720501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680128 + ... + 680131.

It is an arithmetic number, because the mean of its divisors is an integer number (1020195).

2^2720518 is an apocalyptic number.

2720518 is a deficient number, since it is larger than the sum of its proper divisors (1360262).

2720518 is a wasteful number, since it uses less digits than its factorization.

2720518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360261.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2720518 is about 1649.3992845882. The cubic root of 2720518 is about 139.5995016443.

The spelling of 2720518 in words is "two million, seven hundred twenty thousand, five hundred eighteen".