1520228540 has 12 divisors (see below), whose sum is σ = 3192479976. Its totient is φ = 608091408.

The previous prime is 1520228537. The next prime is 1520228543. The reversal of 1520228540 is 458220251.

It is an interprime number because it is at equal distance from previous prime (1520228537) and next prime (1520228543).

It is a super-2 number, since 2×1520228540² = 4622189627661063200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520228543) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 38005694 + ... + 38005733.

It is an arithmetic number, because the mean of its divisors is an integer number (266039998).

Almost surely, 2^1520228540 is an apocalyptic number.

1520228540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520228540 is an abundant number, since it is smaller than the sum of its proper divisors (1672251436).

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

1520228540 is a wasteful number, since it uses less digits than its factorization.

1520228540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76011436 (or 76011434 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 1520228540 is about 38990.1082327300. The cubic root of 1520228540 is about 1149.8370380300.

Adding to 1520228540 its reverse (458220251), we get a palindrome (1978448791).

The spelling of 1520228540 in words is "one billion, five hundred twenty million, two hundred twenty-eight thousand, five hundred forty".