1020502040 has 64 divisors (see below), whose sum is σ = 2345492160. Its totient is φ = 399513600.

The previous prime is 1020502039. The next prime is 1020502057. The reversal of 1020502040 is 402050201.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 398765 + ... + 401315.

It is an arithmetic number, because the mean of its divisors is an integer number (36648315).

Almost surely, 2^1020502040 is an apocalyptic number.

1020502040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020502040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172746080).

1020502040 is an abundant number, since it is smaller than the sum of its proper divisors (1324990120).

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

1020502040 is a wasteful number, since it uses less digits than its factorization.

1020502040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2772 (or 2768 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1020502040 is about 31945.2976195245. The cubic root of 1020502040 is about 1006.7878343885.

Adding to 1020502040 its reverse (402050201), we get a palindrome (1422552241).

The spelling of 1020502040 in words is "one billion, twenty million, five hundred two thousand, forty".