1155471720 has 64 divisors (see below), whose sum is σ = 3733067520. Its totient is φ = 284423424.

The previous prime is 1155471701. The next prime is 1155471721. The reversal of 1155471720 is 271745511.

It is a super-2 number, since 2×1155471720² = 2670229791439516800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155471721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368784 + ... + 371903.

It is an arithmetic number, because the mean of its divisors is an integer number (58329180).

Almost surely, 2^1155471720 is an apocalyptic number.

1155471720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155471720 is an abundant number, since it is smaller than the sum of its proper divisors (2577595800).

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

1155471720 is a wasteful number, since it uses less digits than its factorization.

1155471720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740714 (or 740710 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 33.

The square root of 1155471720 is about 33992.2302886998. The cubic root of 1155471720 is about 1049.3485664473.

The spelling of 1155471720 in words is "one billion, one hundred fifty-five million, four hundred seventy-one thousand, seven hundred twenty".