1154321028 has 108 divisors (see below), whose sum is σ = 3402754992. Its totient is φ = 328980960.

The previous prime is 1154321027. The next prime is 1154321071. The reversal of 1154321028 is 8201234511.

1154321028 is a `hidden beast` number, since 11 + 543 + 2 + 102 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1154320992 and 1154321010.

It is not an unprimeable number, because it can be changed into a prime (1154321027) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1218451 + ... + 1219397.

Almost surely, 2^1154321028 is an apocalyptic number.

1154321028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1154321028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1701377496).

1154321028 is an abundant number, since it is smaller than the sum of its proper divisors (2248433964).

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

1154321028 is a wasteful number, since it uses less digits than its factorization.

1154321028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662 (or 1650 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1154321028 is about 33975.3002635738. The cubic root of 1154321028 is about 1049.0001148066. Note that the first 3 decimals are identical.

Adding to 1154321028 its reverse (8201234511), we get a palindrome (9355555539).

The spelling of 1154321028 in words is "one billion, one hundred fifty-four million, three hundred twenty-one thousand, twenty-eight".