2400023 has 4 divisors (see below), whose sum is σ = 2526360. Its totient is φ = 2273688.

The previous prime is 2400019. The next prime is 2400031. The reversal of 2400023 is 3200042.

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

It is a cyclic number.

It is not a de Polignac number, because 2400023 - 2² = 2400019 is a prime.

It is a super-2 number, since 2×2400023² = 11520220801058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2399977 and 2400013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400053) 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, 63140 + ... + 63177.

It is an arithmetic number, because the mean of its divisors is an integer number (631590).

2^2400023 is an apocalyptic number.

2400023 is a deficient number, since it is larger than the sum of its proper divisors (126337).

2400023 is a wasteful number, since it uses less digits than its factorization.

2400023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126336.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 2400023 is about 1549.2007616833. The cubic root of 2400023 is about 133.8870177083.

Adding to 2400023 its reverse (3200042), we get a palindrome (5600065).

The spelling of 2400023 in words is "two million, four hundred thousand, twenty-three".