2780247 has 8 divisors (see below), whose sum is σ = 3754240. Its totient is φ = 1829880.

The previous prime is 2780243. The next prime is 2780273. The reversal of 2780247 is 7420872.

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

It is not a de Polignac number, because 2780247 - 2² = 2780243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5629 + ... + 6102.

It is an arithmetic number, because the mean of its divisors is an integer number (469280).

2^2780247 is an apocalyptic number.

2780247 is a deficient number, since it is larger than the sum of its proper divisors (973993).

2780247 is a wasteful number, since it uses less digits than its factorization.

2780247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11813.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 2780247 is about 1667.4072687859. The cubic root of 2780247 is about 140.6137510014.

The spelling of 2780247 in words is "two million, seven hundred eighty thousand, two hundred forty-seven".