1002440023 has 16 divisors (see below), whose sum is σ = 1103741856. Its totient is φ = 904775040.

The previous prime is 1002439979. The next prime is 1002440051. The reversal of 1002440023 is 3200442001.

It is not a de Polignac number, because 1002440023 - 2⁹ = 1002439511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002439979 and 1002440006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002440423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133536 + ... + 140842.

It is an arithmetic number, because the mean of its divisors is an integer number (68983866).

Almost surely, 2^1002440023 is an apocalyptic number.

1002440023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1002440023 is a deficient number, since it is larger than the sum of its proper divisors (101301833).

1002440023 is a wasteful number, since it uses less digits than its factorization.

1002440023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7554.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1002440023 is about 31661.3332473539. Note that the first 3 decimals coincide. The cubic root of 1002440023 is about 1000.8126803717.

Adding to 1002440023 its reverse (3200442001), we get a palindrome (4202882024).

The spelling of 1002440023 in words is "one billion, two million, four hundred forty thousand, twenty-three".