1520442330 has 64 divisors (see below), whose sum is σ = 4011296256. Its totient is φ = 365768000.

The previous prime is 1520442317. The next prime is 1520442359. The reversal of 1520442330 is 332440251.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1520442330.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25645 + ... + 60815.

It is an arithmetic number, because the mean of its divisors is an integer number (62676504).

Almost surely, 2^1520442330 is an apocalyptic number.

1520442330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520442330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2005648128).

1520442330 is an abundant number, since it is smaller than the sum of its proper divisors (2490853926).

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

1520442330 is a wasteful number, since it uses less digits than its factorization.

1520442330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35323.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1520442330 is about 38992.8497291491. The cubic root of 1520442330 is about 1149.8909360967.

Adding to 1520442330 its reverse (332440251), we get a palindrome (1852882581).

The spelling of 1520442330 in words is "one billion, five hundred twenty million, four hundred forty-two thousand, three hundred thirty".