685508632 has 8 divisors (see below), whose sum is σ = 1285328700. Its totient is φ = 342754312.

The previous prime is 685508591. The next prime is 685508647. The reversal of 685508632 is 236805586.

It is a happy number.

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

It is a super-2 number, since 2×685508632² = 939844169093022848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42844282 + ... + 42844297.

Almost surely, 2^685508632 is an apocalyptic number.

It is an amenable number.

685508632 is a deficient number, since it is larger than the sum of its proper divisors (599820068).

685508632 is a wasteful number, since it uses less digits than its factorization.

685508632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85688585 (or 85688581 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 685508632 is about 26182.2197683848. The cubic root of 685508632 is about 881.7341115393.

The spelling of 685508632 in words is "six hundred eighty-five million, five hundred eight thousand, six hundred thirty-two".