1020320544 has 48 divisors (see below), whose sum is σ = 2683007712. Its totient is φ = 339514368.

The previous prime is 1020320533. The next prime is 1020320557. The reversal of 1020320544 is 4450230201.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1020320544.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47967 + ... + 65889.

It is an arithmetic number, because the mean of its divisors is an integer number (55895994).

Almost surely, 2^1020320544 is an apocalyptic number.

It is an amenable number.

1020320544 is an abundant number, since it is smaller than the sum of its proper divisors (1662687168).

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

1020320544 is a wasteful number, since it uses less digits than its factorization.

1020320544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18529 (or 18521 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1020320544 is about 31942.4567621215. The cubic root of 1020320544 is about 1006.7281452057.

Adding to 1020320544 its reverse (4450230201), we get a palindrome (5470550745).

The spelling of 1020320544 in words is "one billion, twenty million, three hundred twenty thousand, five hundred forty-four".