684968896 has 28 divisors (see below), whose sum is σ = 1439192448. Its totient is φ = 322337792.

The previous prime is 684968861. The next prime is 684968899. The reversal of 684968896 is 698869486.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684968899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313696 + ... + 315871.

Almost surely, 2^684968896 is an apocalyptic number.

It is an amenable number.

684968896 is an abundant number, since it is smaller than the sum of its proper divisors (754223552).

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

684968896 is a wasteful number, since it uses less digits than its factorization.

684968896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629596 (or 629586 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 64.

The square root of 684968896 is about 26171.9104384835. The cubic root of 684968896 is about 881.5026393273.

The spelling of 684968896 in words is "six hundred eighty-four million, nine hundred sixty-eight thousand, eight hundred ninety-six".