684437848 has 8 divisors (see below), whose sum is σ = 1283320980. Its totient is φ = 342218920.

The previous prime is 684437843. The next prime is 684437849. The reversal of 684437848 is 848734486.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×684437848² = 936910335549742208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 684437795 and 684437804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684437843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42777358 + ... + 42777373.

Almost surely, 2^684437848 is an apocalyptic number.

It is an amenable number.

684437848 is a deficient number, since it is larger than the sum of its proper divisors (598883132).

684437848 is a wasteful number, since it uses less digits than its factorization.

684437848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85554737 (or 85554733 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 52.

The square root of 684437848 is about 26161.7630904341. The cubic root of 684437848 is about 881.2747743618.

The spelling of 684437848 in words is "six hundred eighty-four million, four hundred thirty-seven thousand, eight hundred forty-eight".