1128399360 has 480 divisors, whose sum is σ = 4265566272. Its totient is φ = 252149760.

The previous prime is 1128399347. The next prime is 1128399373. The reversal of 1128399360 is 639938211.

It is an interprime number because it is at equal distance from previous prime (1128399347) and next prime (1128399373).

It is a tau number, because it is divible by the number of its divisors (480).

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, 30497262 + ... + 30497298.

Almost surely, 2^1128399360 is an apocalyptic number.

1128399360 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 1128399360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2132783136).

1128399360 is an abundant number, since it is smaller than the sum of its proper divisors (3137166912).

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

1128399360 is a wasteful number, since it uses less digits than its factorization.

1128399360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1128399360 is about 33591.6561068370. The cubic root of 1128399360 is about 1041.0884068868.

The spelling of 1128399360 in words is "one billion, one hundred twenty-eight million, three hundred ninety-nine thousand, three hundred sixty".