1428922368 has 84 divisors (see below), whose sum is σ = 4127958978. Its totient is φ = 476282880.

The previous prime is 1428922309. The next prime is 1428922393. The reversal of 1428922368 is 8632298241.

1428922368 is a `hidden beast` number, since 1 + 4 + 289 + 2 + 2 + 368 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1052872704 + 376049664 = 32448^2 + 19392^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64038 + ... + 83418.

Almost surely, 2^1428922368 is an apocalyptic number.

1428922368 is a gapful number since it is divisible by the number (18) 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 1428922368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2063979489).

1428922368 is an abundant number, since it is smaller than the sum of its proper divisors (2699036610).

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

1428922368 is an equidigital number, since it uses as much as digits as its factorization.

1428922368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19413 (or 19386 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 1428922368 is about 37801.0895081081. The cubic root of 1428922368 is about 1126.3400966766.

The spelling of 1428922368 in words is "one billion, four hundred twenty-eight million, nine hundred twenty-two thousand, three hundred sixty-eight".