1690898568 has 32 divisors (see below), whose sum is σ = 4270832160. Its totient is φ = 557821440.

The previous prime is 1690898543. The next prime is 1690898611. The reversal of 1690898568 is 8658980961.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360838 + ... + 365493.

It is an arithmetic number, because the mean of its divisors is an integer number (133463505).

Almost surely, 2^1690898568 is an apocalyptic number.

It is an amenable number.

1690898568 is an abundant number, since it is smaller than the sum of its proper divisors (2579933592).

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

1690898568 is a wasteful number, since it uses less digits than its factorization.

1690898568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726437 (or 726433 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 60.

The square root of 1690898568 is about 41120.5370587496. The cubic root of 1690898568 is about 1191.3494960511.

The spelling of 1690898568 in words is "one billion, six hundred ninety million, eight hundred ninety-eight thousand, five hundred sixty-eight".