1218528030 has 64 divisors (see below), whose sum is σ = 3011263488. Its totient is φ = 315342720.

The previous prime is 1218528013. The next prime is 1218528037. The reversal of 1218528030 is 308258121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218528037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 512745 + ... + 515115.

It is an arithmetic number, because the mean of its divisors is an integer number (47050992).

Almost surely, 2^1218528030 is an apocalyptic number.

1218528030 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 1218528030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1505631744).

1218528030 is an abundant number, since it is smaller than the sum of its proper divisors (1792735458).

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

1218528030 is a wasteful number, since it uses less digits than its factorization.

1218528030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1218528030 is about 34907.4208442847. The cubic root of 1218528030 is about 1068.0998184839.

The spelling of 1218528030 in words is "one billion, two hundred eighteen million, five hundred twenty-eight thousand, thirty".