1530120440 has 16 divisors (see below), whose sum is σ = 3442771080. Its totient is φ = 612048160.

The previous prime is 1530120439. The next prime is 1530120463. The reversal of 1530120440 is 440210351.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 19126466 + ... + 19126545.

Almost surely, 2^1530120440 is an apocalyptic number.

1530120440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1530120440 is an abundant number, since it is smaller than the sum of its proper divisors (1912650640).

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

1530120440 is a wasteful number, since it uses less digits than its factorization.

1530120440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38253022 (or 38253018 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1530120440 is about 39116.7539553067. The cubic root of 1530120440 is about 1152.3255875461.

Adding to 1530120440 its reverse (440210351), we get a palindrome (1970330791).

The spelling of 1530120440 in words is "one billion, five hundred thirty million, one hundred twenty thousand, four hundred forty".