1089871742 has 8 divisors (see below), whose sum is σ = 1635320232. Its totient is φ = 544765000.

The previous prime is 1089871733. The next prime is 1089871789. The reversal of 1089871742 is 2471789801.

It is a happy number.

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

It is a super-2 number, since 2×1089871742² = 2375640828020229128, which contains 22 as substring.

It is a congruent number.

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, 77309 + ... + 90312.

It is an arithmetic number, because the mean of its divisors is an integer number (204415029).

Almost surely, 2^1089871742 is an apocalyptic number.

1089871742 is a deficient number, since it is larger than the sum of its proper divisors (545448490).

1089871742 is a wasteful number, since it uses less digits than its factorization.

1089871742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170874.

The product of its (nonzero) digits is 225792, while the sum is 47.

The square root of 1089871742 is about 33013.2055698928. The cubic root of 1089871742 is about 1029.1020993140.

The spelling of 1089871742 in words is "one billion, eighty-nine million, eight hundred seventy-one thousand, seven hundred forty-two".