684455406 has 16 divisors (see below), whose sum is σ = 1369342848. Its totient is φ = 228079800.

The previous prime is 684455389. The next prime is 684455423. The reversal of 684455406 is 604554486.

It is an interprime number because it is at equal distance from previous prime (684455389) and next prime (684455423).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4821 + ... + 37311.

It is an arithmetic number, because the mean of its divisors is an integer number (85583928).

Almost surely, 2^684455406 is an apocalyptic number.

684455406 is an abundant number, since it is smaller than the sum of its proper divisors (684887442).

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

684455406 is a wasteful number, since it uses less digits than its factorization.

684455406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36007.

The product of its (nonzero) digits is 460800, while the sum is 42.

The square root of 684455406 is about 26162.0986543511. The cubic root of 684455406 is about 881.2823101277.

The spelling of 684455406 in words is "six hundred eighty-four million, four hundred fifty-five thousand, four hundred six".