1520350728 has 32 divisors (see below), whose sum is σ = 4093252800. Its totient is φ = 467800128.

The previous prime is 1520350717. The next prime is 1520350729. The reversal of 1520350728 is 8270530251.

It is a super-2 number, since 2×1520350728² = 4622932672260259968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1520350729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2436148 + ... + 2436771.

It is an arithmetic number, because the mean of its divisors is an integer number (127914150).

Almost surely, 2^1520350728 is an apocalyptic number.

It is an amenable number.

1520350728 is an abundant number, since it is smaller than the sum of its proper divisors (2572902072).

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

1520350728 is a wasteful number, since it uses less digits than its factorization.

1520350728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4872941 (or 4872937 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 1520350728 is about 38991.6751114901. The cubic root of 1520350728 is about 1149.8678431623.

Adding to 1520350728 its reverse (8270530251), we get a palindrome (9790880979).

The spelling of 1520350728 in words is "one billion, five hundred twenty million, three hundred fifty thousand, seven hundred twenty-eight".