1128627949 has 4 divisors (see below), whose sum is σ = 1188029440. Its totient is φ = 1069226460.

The previous prime is 1128627947. The next prime is 1128627979. The reversal of 1128627949 is 9497268211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1128627949 - 2¹ = 1128627947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128627947) 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, 29700717 + ... + 29700754.

It is an arithmetic number, because the mean of its divisors is an integer number (297007360).

Almost surely, 2^1128627949 is an apocalyptic number.

1128627949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1128627949 is a deficient number, since it is larger than the sum of its proper divisors (59401491).

1128627949 is an equidigital number, since it uses as much as digits as its factorization.

1128627949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59401490.

The product of its digits is 435456, while the sum is 49.

The square root of 1128627949 is about 33595.0584014971. The cubic root of 1128627949 is about 1041.1587027112.

The spelling of 1128627949 in words is "one billion, one hundred twenty-eight million, six hundred twenty-seven thousand, nine hundred forty-nine".