1523020320 has 120 divisors (see below), whose sum is σ = 5375038284. Its totient is φ = 406135296.

The previous prime is 1523020319. The next prime is 1523020339. The reversal of 1523020320 is 230203251.

It can be written as a sum of positive squares in 2 ways, for example, as 1420686864 + 102333456 = 37692^2 + 10116^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1523020293 and 1523020302.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 45799 + ... + 71718.

Almost surely, 2^1523020320 is an apocalyptic number.

1523020320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1523020320 is an abundant number, since it is smaller than the sum of its proper divisors (3852017964).

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

1523020320 is a wasteful number, since it uses less digits than its factorization.

1523020320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117544 (or 117527 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 1523020320 is about 39025.8929430193. The cubic root of 1523020320 is about 1150.5404693315.

Adding to 1523020320 its reverse (230203251), we get a palindrome (1753223571).

The spelling of 1523020320 in words is "one billion, five hundred twenty-three million, twenty thousand, three hundred twenty".