1128908642 has 8 divisors (see below), whose sum is σ = 1698705756. Its totient is φ = 562673392.

The previous prime is 1128908623. The next prime is 1128908699. The reversal of 1128908642 is 2468098211.

It can be written as a sum of positive squares in 2 ways, for example, as 1124864521 + 4044121 = 33539^2 + 2011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1128908642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889673 + ... + 890940.

Almost surely, 2^1128908642 is an apocalyptic number.

1128908642 is a deficient number, since it is larger than the sum of its proper divisors (569797114).

1128908642 is a wasteful number, since it uses less digits than its factorization.

1128908642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780932.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 1128908642 is about 33599.2357353556. The cubic root of 1128908642 is about 1041.2450086062.

The spelling of 1128908642 in words is "one billion, one hundred twenty-eight million, nine hundred eight thousand, six hundred forty-two".