1153455420 has 144 divisors (see below), whose sum is σ = 3681901440. Its totient is φ = 268939008.

The previous prime is 1153455361. The next prime is 1153455431. The reversal of 1153455420 is 245543511.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189667 + ... + 195653.

It is an arithmetic number, because the mean of its divisors is an integer number (25568760).

Almost surely, 2^1153455420 is an apocalyptic number.

1153455420 is a gapful number since it is divisible by the number (10) 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 1153455420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1840950720).

1153455420 is an abundant number, since it is smaller than the sum of its proper divisors (2528446020).

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

1153455420 is a wasteful number, since it uses less digits than its factorization.

1153455420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6044 (or 6029 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 1153455420 is about 33962.5590908577. The cubic root of 1153455420 is about 1048.7378394272.

Adding to 1153455420 its reverse (245543511), we get a palindrome (1398998931).

The spelling of 1153455420 in words is "one billion, one hundred fifty-three million, four hundred fifty-five thousand, four hundred twenty".