678633532 has 12 divisors (see below), whose sum is σ = 1187975320. Its totient is φ = 339212016.

The previous prime is 678633509. The next prime is 678633533. The reversal of 678633532 is 235336876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678633533) 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, 10578 + ... + 38329.

Almost surely, 2^678633532 is an apocalyptic number.

It is an amenable number.

678633532 is a deficient number, since it is larger than the sum of its proper divisors (509341788).

678633532 is a wasteful number, since it uses less digits than its factorization.

678633532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52380 (or 52378 counting only the distinct ones).

The product of its digits is 544320, while the sum is 43.

The square root of 678633532 is about 26050.5956169912. The cubic root of 678633532 is about 878.7765073714.

The spelling of 678633532 in words is "six hundred seventy-eight million, six hundred thirty-three thousand, five hundred thirty-two".