1520729450 has 24 divisors (see below), whose sum is σ = 2832006240. Its totient is φ = 607550000.

The previous prime is 1520729447. The next prime is 1520729491. The reversal of 1520729450 is 549270251.

It is a super-3 number, since 3×1520729450³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1520729450.

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 11 ways as a sum of consecutive naturals, for example, 23825 + ... + 60075.

It is an arithmetic number, because the mean of its divisors is an integer number (118000260).

Almost surely, 2^1520729450 is an apocalyptic number.

1520729450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1520729450 is a deficient number, since it is larger than the sum of its proper divisors (1311276790).

1520729450 is a wasteful number, since it uses less digits than its factorization.

1520729450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37102 (or 37097 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 1520729450 is about 38996.5312559976. The cubic root of 1520729450 is about 1149.9633132594.

The spelling of 1520729450 in words is "one billion, five hundred twenty million, seven hundred twenty-nine thousand, four hundred fifty".