684457406 has 32 divisors (see below), whose sum is σ = 1100131200. Its totient is φ = 318448800.

The previous prime is 684457399. The next prime is 684457427. The reversal of 684457406 is 604754486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532841 + ... + 534123.

It is an arithmetic number, because the mean of its divisors is an integer number (34379100).

Almost surely, 2^684457406 is an apocalyptic number.

684457406 is a deficient number, since it is larger than the sum of its proper divisors (415673794).

684457406 is a wasteful number, since it uses less digits than its factorization.

684457406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544.

The product of its (nonzero) digits is 645120, while the sum is 44.

The square root of 684457406 is about 26162.1368775565. The cubic root of 684457406 is about 881.2831685050.

The spelling of 684457406 in words is "six hundred eighty-four million, four hundred fifty-seven thousand, four hundred six".