2720390 has 8 divisors (see below), whose sum is σ = 4896720. Its totient is φ = 1088152.

The previous prime is 2720387. The next prime is 2720411. The reversal of 2720390 is 930272.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136010 + ... + 136029.

It is an arithmetic number, because the mean of its divisors is an integer number (612090).

2^2720390 is an apocalyptic number.

2720390 is a deficient number, since it is larger than the sum of its proper divisors (2176330).

2720390 is a wasteful number, since it uses less digits than its factorization.

2720390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272046.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 2720390 is about 1649.3604821263. The cubic root of 2720390 is about 139.5973122309.

The spelling of 2720390 in words is "two million, seven hundred twenty thousand, three hundred ninety".