688075380 has 72 divisors (see below), whose sum is σ = 2154507264. Its totient is φ = 177566400.

The previous prime is 688075343. The next prime is 688075387. The reversal of 688075380 is 83570886.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688075387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56076 + ... + 67235.

It is an arithmetic number, because the mean of its divisors is an integer number (29923712).

Almost surely, 2^688075380 is an apocalyptic number.

688075380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

688075380 is an abundant number, since it is smaller than the sum of its proper divisors (1466431884).

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

688075380 is a wasteful number, since it uses less digits than its factorization.

688075380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123357 (or 123352 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 688075380 is about 26231.1909756305. The cubic root of 688075380 is about 882.8332323666.

The spelling of 688075380 in words is "six hundred eighty-eight million, seventy-five thousand, three hundred eighty".