1128490271 has 4 divisors (see below), whose sum is σ = 1139663544. Its totient is φ = 1117317000.

The previous prime is 1128490247. The next prime is 1128490291. The reversal of 1128490271 is 1720948211.

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 1128490271 - 2²² = 1124295967 is a prime.

It is a super-3 number, since 3×1128490271³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128490201) 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, 5586485 + ... + 5586686.

It is an arithmetic number, because the mean of its divisors is an integer number (284915886).

Almost surely, 2^1128490271 is an apocalyptic number.

1128490271 is a deficient number, since it is larger than the sum of its proper divisors (11173273).

1128490271 is a wasteful number, since it uses less digits than its factorization.

1128490271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11173272.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1128490271 is about 33593.0092578798. The cubic root of 1128490271 is about 1041.1163650282.

The spelling of 1128490271 in words is "one billion, one hundred twenty-eight million, four hundred ninety thousand, two hundred seventy-one".