689835042 has 40 divisors (see below), whose sum is σ = 1664649756. Its totient is φ = 212256288.

The previous prime is 689835037. The next prime is 689835053. The reversal of 689835042 is 240538986.

689835042 is a `hidden beast` number, since 68 + 9 + 83 + 504 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 616578561 + 73256481 = 24831^2 + 8559^2 .

It is a super-2 number, since 2×689835042² = 951744770342283528, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 161673 + ... + 165884.

Almost surely, 2^689835042 is an apocalyptic number.

689835042 is an abundant number, since it is smaller than the sum of its proper divisors (974814714).

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

689835042 is a wasteful number, since it uses less digits than its factorization.

689835042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327584 (or 327575 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 689835042 is about 26264.7109635724. The cubic root of 689835042 is about 883.5851682419.

The spelling of 689835042 in words is "six hundred eighty-nine million, eight hundred thirty-five thousand, forty-two".