1520044220 has 12 divisors (see below), whose sum is σ = 3192092904. Its totient is φ = 608017680.

The previous prime is 1520044189. The next prime is 1520044271. The reversal of 1520044220 is 224400251.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 76002211 = 1520044220 / (1 + 5 + 2 + 0 + 0 + 4 + 4 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1520044192 and 1520044201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38001086 + ... + 38001125.

It is an arithmetic number, because the mean of its divisors is an integer number (266007742).

Almost surely, 2^1520044220 is an apocalyptic number.

1520044220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520044220 is an abundant number, since it is smaller than the sum of its proper divisors (1672048684).

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

1520044220 is a wasteful number, since it uses less digits than its factorization.

1520044220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76002220 (or 76002218 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1520044220 is about 38987.7444846454. The cubic root of 1520044220 is about 1149.7905655154.

Adding to 1520044220 its reverse (224400251), we get a palindrome (1744444471).

The spelling of 1520044220 in words is "one billion, five hundred twenty million, forty-four thousand, two hundred twenty".