1155402000 has 120 divisors (see below), whose sum is σ = 4035496920. Its totient is φ = 308102400.

The previous prime is 1155401993. The next prime is 1155402011. The reversal of 1155402000 is 2045511.

It can be written as a sum of positive squares in 4 ways, for example, as 16744464 + 1138657536 = 4092^2 + 33744^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14095 + ... + 50094.

It is an arithmetic number, because the mean of its divisors is an integer number (33629141).

Almost surely, 2^1155402000 is an apocalyptic number.

1155402000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155402000 is an abundant number, since it is smaller than the sum of its proper divisors (2880094920).

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

1155402000 is a wasteful number, since it uses less digits than its factorization.

1155402000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64218 (or 64199 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1155402000 is about 33991.2047447571. The cubic root of 1155402000 is about 1049.3274604776.

Adding to 1155402000 its reverse (2045511), we get a palindrome (1157447511).

The spelling of 1155402000 in words is "one billion, one hundred fifty-five million, four hundred two thousand".