1128426390 has 288 divisors, whose sum is σ = 3816802080. Its totient is φ = 238085568.

The previous prime is 1128426367. The next prime is 1128426401. The reversal of 1128426390 is 936248211.

1128426390 is a `hidden beast` number, since 1 + 12 + 8 + 4 + 2 + 639 + 0 = 666.

It is a super-2 number, since 2×1128426390² = 2546692235296864200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 86802024 + ... + 86802036.

It is an arithmetic number, because the mean of its divisors is an integer number (13252785).

Almost surely, 2^1128426390 is an apocalyptic number.

1128426390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128426390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1908401040).

1128426390 is an abundant number, since it is smaller than the sum of its proper divisors (2688375690).

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

1128426390 is an frugal number, since it uses more digits than its factorization.

1128426390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1128426390 is about 33592.0584364817. The cubic root of 1128426390 is about 1041.0967196633.

The spelling of 1128426390 in words is "one billion, one hundred twenty-eight million, four hundred twenty-six thousand, three hundred ninety".