1002020492 has 24 divisors (see below), whose sum is σ = 1916346432. Its totient is φ = 454654800.

The previous prime is 1002020489. The next prime is 1002020497. The reversal of 1002020492 is 2940202001.

It is not an unprimeable number, because it can be changed into a prime (1002020497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5183 + ... + 45065.

It is an arithmetic number, because the mean of its divisors is an integer number (79847768).

Almost surely, 2^1002020492 is an apocalyptic number.

It is an amenable number.

1002020492 is a deficient number, since it is larger than the sum of its proper divisors (914325940).

1002020492 is a wasteful number, since it uses less digits than its factorization.

1002020492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40469 (or 40467 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1002020492 is about 31654.7072644812. The cubic root of 1002020492 is about 1000.6730442432.

Adding to 1002020492 its reverse (2940202001), we get a palindrome (3942222493).

The spelling of 1002020492 in words is "one billion, two million, twenty thousand, four hundred ninety-two".