2820427 has 4 divisors (see below), whose sum is σ = 2834800. Its totient is φ = 2806056.

The previous prime is 2820407. The next prime is 2820479. The reversal of 2820427 is 7240282.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2820427 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (2820407) 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, 6888 + ... + 7285.

It is an arithmetic number, because the mean of its divisors is an integer number (708700).

2^2820427 is an apocalyptic number.

2820427 is a deficient number, since it is larger than the sum of its proper divisors (14373).

2820427 is a wasteful number, since it uses less digits than its factorization.

2820427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14372.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 2820427 is about 1679.4126949621. The cubic root of 2820427 is about 141.2878949152.

The spelling of 2820427 in words is "two million, eight hundred twenty thousand, four hundred twenty-seven".