1154229640 has 16 divisors (see below), whose sum is σ = 2597016780. Its totient is φ = 461691840.

The previous prime is 1154229589. The next prime is 1154229649. The reversal of 1154229640 is 469224511.

It can be written as a sum of positive squares in 2 ways, for example, as 1050148836 + 104080804 = 32406^2 + 10202^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1154229596 and 1154229605.

It is not an unprimeable number, because it can be changed into a prime (1154229649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14427831 + ... + 14427910.

Almost surely, 2^1154229640 is an apocalyptic number.

1154229640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1154229640 is an abundant number, since it is smaller than the sum of its proper divisors (1442787140).

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

1154229640 is a wasteful number, since it uses less digits than its factorization.

1154229640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28855752 (or 28855748 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1154229640 is about 33973.9553187438. The cubic root of 1154229640 is about 1048.9724308406.

The spelling of 1154229640 in words is "one billion, one hundred fifty-four million, two hundred twenty-nine thousand, six hundred forty".