2428681 has 4 divisors (see below), whose sum is σ = 2443392. Its totient is φ = 2413972.

The previous prime is 2428667. The next prime is 2428687. The reversal of 2428681 is 1868242.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1868242 = 2 ⋅934121.

It is a cyclic number.

It is not a de Polignac number, because 2428681 - 2⁵ = 2428649 is a prime.

It is a super-2 number, since 2×2428681² = 11796982799522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

2428681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2428687) 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, 7105 + ... + 7438.

It is an arithmetic number, because the mean of its divisors is an integer number (610848).

2^2428681 is an apocalyptic number.

It is an amenable number.

2428681 is a deficient number, since it is larger than the sum of its proper divisors (14711).

2428681 is a wasteful number, since it uses less digits than its factorization.

2428681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14710.

The product of its digits is 6144, while the sum is 31.

The square root of 2428681 is about 1558.4225999388. The cubic root of 2428681 is about 134.4178130030.

The spelling of 2428681 in words is "two million, four hundred twenty-eight thousand, six hundred eighty-one".