1220733500 has 96 divisors (see below), whose sum is σ = 3145519104. Its totient is φ = 405000000.

The previous prime is 1220733421. The next prime is 1220733509. The reversal of 1220733500 is 53370221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220733509) 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, 102875 + ... + 114125.

It is an arithmetic number, because the mean of its divisors is an integer number (32765824).

Almost surely, 2^1220733500 is an apocalyptic number.

1220733500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220733500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1572759552).

1220733500 is an abundant number, since it is smaller than the sum of its proper divisors (1924785604).

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

1220733500 is a wasteful number, since it uses less digits than its factorization.

1220733500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11308 (or 11296 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 1220733500 is about 34938.9968373449. The cubic root of 1220733500 is about 1068.7438311147.

The spelling of 1220733500 in words is "one billion, two hundred twenty million, seven hundred thirty-three thousand, five hundred".