1002122440 has 32 divisors (see below), whose sum is σ = 2459756160. Its totient is φ = 364408000.

The previous prime is 1002122431. The next prime is 1002122447. The reversal of 1002122440 is 442212001.

It is not an unprimeable number, because it can be changed into a prime (1002122447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1138336 + ... + 1139215.

It is an arithmetic number, because the mean of its divisors is an integer number (76867380).

Almost surely, 2^1002122440 is an apocalyptic number.

1002122440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002122440 is an abundant number, since it is smaller than the sum of its proper divisors (1457633720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1002122440 is a wasteful number, since it uses less digits than its factorization.

1002122440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277573 (or 2277569 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1002122440 is about 31656.3175369467. The cubic root of 1002122440 is about 1000.7069800614.

Adding to 1002122440 its reverse (442212001), we get a palindrome (1444334441).

The spelling of 1002122440 in words is "one billion, two million, one hundred twenty-two thousand, four hundred forty".