690664384 has 56 divisors (see below), whose sum is σ = 1400586480. Its totient is φ = 337821696.

The previous prime is 690664379. The next prime is 690664391. The reversal of 690664384 is 483466096.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1196704 + ... + 1197280.

Almost surely, 2^690664384 is an apocalyptic number.

690664384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690664384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (700293240).

690664384 is an abundant number, since it is smaller than the sum of its proper divisors (709922096).

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

690664384 is a wasteful number, since it uses less digits than its factorization.

690664384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 46.

The square root of 690664384 is about 26280.4943636911. The cubic root of 690664384 is about 883.9391179927.

The spelling of 690664384 in words is "six hundred ninety million, six hundred sixty-four thousand, three hundred eighty-four".