1240020002 has 8 divisors (see below), whose sum is σ = 2003109276. Its totient is φ = 572316912.

The previous prime is 1240019947. The next prime is 1240020007. The reversal of 1240020002 is 2000200421.

It can be written as a sum of positive squares in 2 ways, for example, as 1060218721 + 179801281 = 32561^2 + 13409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1240020007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23846513 + ... + 23846564.

Almost surely, 2^1240020002 is an apocalyptic number.

1240020002 is a deficient number, since it is larger than the sum of its proper divisors (763089274).

1240020002 is a wasteful number, since it uses less digits than its factorization.

1240020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47693092.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1240020002 is about 35213.9177314879. The cubic root of 1240020002 is about 1074.3428475413.

Adding to 1240020002 its reverse (2000200421), we get a palindrome (3240220423).

The spelling of 1240020002 in words is "one billion, two hundred forty million, twenty thousand, two".