1155505372 has 48 divisors (see below), whose sum is σ = 2418554880. Its totient is φ = 472298112.

The previous prime is 1155505369. The next prime is 1155505381. The reversal of 1155505372 is 2735055511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233904 + ... + 238792.

It is an arithmetic number, because the mean of its divisors is an integer number (50386560).

Almost surely, 2^1155505372 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155505372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1209277440).

1155505372 is an abundant number, since it is smaller than the sum of its proper divisors (1263049508).

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

1155505372 is a wasteful number, since it uses less digits than its factorization.

1155505372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5290 (or 5288 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 34.

The square root of 1155505372 is about 33992.7252805655. The cubic root of 1155505372 is about 1049.3587534369.

The spelling of 1155505372 in words is "one billion, one hundred fifty-five million, five hundred five thousand, three hundred seventy-two".