690235992 has 80 divisors (see below), whose sum is σ = 1943472960. Its totient is φ = 228868416.

The previous prime is 690235967. The next prime is 690236021. The reversal of 690235992 is 299532096.

It is a congruent number.

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, 124953 + ... + 130359.

It is an arithmetic number, because the mean of its divisors is an integer number (24293412).

Almost surely, 2^690235992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690235992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (971736480).

690235992 is an abundant number, since it is smaller than the sum of its proper divisors (1253236968).

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

690235992 is a wasteful number, since it uses less digits than its factorization.

690235992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5622 (or 5609 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 690235992 is about 26272.3427200545. The cubic root of 690235992 is about 883.7563226175.

The spelling of 690235992 in words is "six hundred ninety million, two hundred thirty-five thousand, nine hundred ninety-two".