1128969408 has 280 divisors, whose sum is σ = 3642644480. Its totient is φ = 308206080.

The previous prime is 1128969407. The next prime is 1128969431. The reversal of 1128969408 is 8049698211.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1128969407) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14290713 + ... + 14290791.

Almost surely, 2^1128969408 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 1128969408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1821322240).

1128969408 is an abundant number, since it is smaller than the sum of its proper divisors (2513675072).

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

1128969408 is an frugal number, since it uses more digits than its factorization.

1128969408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 1128969408 is about 33600.1399997083. The cubic root of 1128969408 is about 1041.2636907081.

The spelling of 1128969408 in words is "one billion, one hundred twenty-eight million, nine hundred sixty-nine thousand, four hundred eight".