1128380651 has 4 divisors (see below), whose sum is σ = 1129543704. Its totient is φ = 1127217600.

The previous prime is 1128380647. The next prime is 1128380663. The reversal of 1128380651 is 1560838211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1128380651 - 2² = 1128380647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128380611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580070 + ... + 582011.

It is an arithmetic number, because the mean of its divisors is an integer number (282385926).

Almost surely, 2^1128380651 is an apocalyptic number.

1128380651 is a deficient number, since it is larger than the sum of its proper divisors (1163053).

1128380651 is an equidigital number, since it uses as much as digits as its factorization.

1128380651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163052.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1128380651 is about 33591.3776287904. The cubic root of 1128380651 is about 1041.0826530638.

The spelling of 1128380651 in words is "one billion, one hundred twenty-eight million, three hundred eighty thousand, six hundred fifty-one".