1002403020 has 48 divisors (see below), whose sum is σ = 2928764160. Its totient is φ = 255685056.

The previous prime is 1002402983. The next prime is 1002403021. The reversal of 1002403020 is 203042001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1002402987 and 1002403005.

It is not an unprimeable number, because it can be changed into a prime (1002403021) 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, 361810 + ... + 364569.

It is an arithmetic number, because the mean of its divisors is an integer number (61015920).

Almost surely, 2^1002403020 is an apocalyptic number.

1002403020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002403020 is an abundant number, since it is smaller than the sum of its proper divisors (1926361140).

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

1002403020 is a wasteful number, since it uses less digits than its factorization.

1002403020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726414 (or 726412 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1002403020 is about 31660.7488856470. The cubic root of 1002403020 is about 1000.8003659102.

Adding to 1002403020 its reverse (203042001), we get a palindrome (1205445021).

The spelling of 1002403020 in words is "one billion, two million, four hundred three thousand, twenty".