1530506820 has 24 divisors (see below), whose sum is σ = 4285419264. Its totient is φ = 408135136.

The previous prime is 1530506801. The next prime is 1530506839. The reversal of 1530506820 is 286050351.

It is an interprime number because it is at equal distance from previous prime (1530506801) and next prime (1530506839).

It is a super-2 number, since 2×1530506820² = 4684902252133024800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12754164 + ... + 12754283.

It is an arithmetic number, because the mean of its divisors is an integer number (178559136).

Almost surely, 2^1530506820 is an apocalyptic number.

1530506820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1530506820 is an abundant number, since it is smaller than the sum of its proper divisors (2754912444).

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

1530506820 is a wasteful number, since it uses less digits than its factorization.

1530506820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25508459 (or 25508457 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1530506820 is about 39121.6924480524. The cubic root of 1530506820 is about 1152.4225729593.

The spelling of 1530506820 in words is "one billion, five hundred thirty million, five hundred six thousand, eight hundred twenty".