1020044540 has 24 divisors (see below), whose sum is σ = 2268099792. Its totient is φ = 384016640.

The previous prime is 1020044533. The next prime is 1020044573. The reversal of 1020044540 is 454400201.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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, 1499726 + ... + 1500405.

It is an arithmetic number, because the mean of its divisors is an integer number (94504158).

Almost surely, 2^1020044540 is an apocalyptic number.

1020044540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020044540 is an abundant number, since it is smaller than the sum of its proper divisors (1248055252).

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

1020044540 is a wasteful number, since it uses less digits than its factorization.

1020044540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000157 (or 3000155 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1020044540 is about 31938.1361384787. The cubic root of 1020044540 is about 1006.6373612996.

Adding to 1020044540 its reverse (454400201), we get a palindrome (1474444741).

The spelling of 1020044540 in words is "one billion, twenty million, forty-four thousand, five hundred forty".