1129979442 has 16 divisors (see below), whose sum is σ = 2264997600. Its totient is φ = 375820032.

The previous prime is 1129979377. The next prime is 1129979449. The reversal of 1129979442 is 2449799211.

It is a junction number, because it is equal to n+sod(n) for n = 1129979391 and 1129979400.

It is not an unprimeable number, because it can be changed into a prime (1129979449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207028 + ... + 212415.

It is an arithmetic number, because the mean of its divisors is an integer number (141562350).

Almost surely, 2^1129979442 is an apocalyptic number.

1129979442 is an abundant number, since it is smaller than the sum of its proper divisors (1135018158).

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

1129979442 is a wasteful number, since it uses less digits than its factorization.

1129979442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419897.

The product of its digits is 326592, while the sum is 48.

The square root of 1129979442 is about 33615.1668447444. The cubic root of 1129979442 is about 1041.5741208049.

The spelling of 1129979442 in words is "one billion, one hundred twenty-nine million, nine hundred seventy-nine thousand, four hundred forty-two".