1155020970 has 128 divisors (see below), whose sum is σ = 3016092672. Its totient is φ = 282009600.

The previous prime is 1155020941. The next prime is 1155021017. The reversal of 1155020970 is 790205511.

It is a super-2 number, since 2×1155020970² = 2668146882279481800, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4261935 + ... + 4262205.

It is an arithmetic number, because the mean of its divisors is an integer number (23563224).

Almost surely, 2^1155020970 is an apocalyptic number.

1155020970 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 1155020970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1508046336).

1155020970 is an abundant number, since it is smaller than the sum of its proper divisors (1861071702).

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

1155020970 is a wasteful number, since it uses less digits than its factorization.

1155020970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 1155020970 is about 33985.5994503554. The cubic root of 1155020970 is about 1049.2120982625.

The spelling of 1155020970 in words is "one billion, one hundred fifty-five million, twenty thousand, nine hundred seventy".