1155200320 has 56 divisors (see below), whose sum is σ = 2912647464. Its totient is φ = 434896896.

The previous prime is 1155200309. The next prime is 1155200329. The reversal of 1155200320 is 230025511.

1155200320 = T₅₁₇₁ + T₅₁₇₂ + ... + T₅₂₅₅.

It can be written as a sum of positive squares in 4 ways, for example, as 386358336 + 768841984 = 19656^2 + 27728^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155200329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100737 + ... + 111616.

Almost surely, 2^1155200320 is an apocalyptic number.

1155200320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155200320 is an abundant number, since it is smaller than the sum of its proper divisors (1757447144).

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

1155200320 is a wasteful number, since it uses less digits than its factorization.

1155200320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212387 (or 212377 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1155200320 is about 33988.2379655080. The cubic root of 1155200320 is about 1049.2664021686.

Adding to 1155200320 its reverse (230025511), we get a palindrome (1385225831).

The spelling of 1155200320 in words is "one billion, one hundred fifty-five million, two hundred thousand, three hundred twenty".