1154473728 has 72 divisors (see below), whose sum is σ = 3171764736. Its totient is φ = 372403200.

The previous prime is 1154473699. The next prime is 1154473729. The reversal of 1154473728 is 8273744511.

It is a self number, because there is not a number n which added to its sum of digits gives 1154473728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154473729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438 + ... + 48053.

It is an arithmetic number, because the mean of its divisors is an integer number (44052288).

Almost surely, 2^1154473728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1154473728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585882368).

1154473728 is an abundant number, since it is smaller than the sum of its proper divisors (2017291008).

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

1154473728 is an equidigital number, since it uses as much as digits as its factorization.

1154473728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48541 (or 48527 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 1154473728 is about 33977.5474100177. The cubic root of 1154473728 is about 1049.0463686219.

The spelling of 1154473728 in words is "one billion, one hundred fifty-four million, four hundred seventy-three thousand, seven hundred twenty-eight".