1690989042 has 8 divisors (see below), whose sum is σ = 3381978096. Its totient is φ = 563663012.

The previous prime is 1690989011. The next prime is 1690989119. The reversal of 1690989042 is 2409890961.

1690989042 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

1690989042 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1690988982 and 1690989000.

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, 140915748 + ... + 140915759.

It is an arithmetic number, because the mean of its divisors is an integer number (422747262).

Almost surely, 2^1690989042 is an apocalyptic number.

1690989042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1690989042 is a wasteful number, since it uses less digits than its factorization.

1690989042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281831512.

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 1690989042 is about 41121.6371512614. The cubic root of 1690989042 is about 1191.3707439710.

The spelling of 1690989042 in words is "one billion, six hundred ninety million, nine hundred eighty-nine thousand, forty-two".